Two teenage boys have been charged with murdering a Queensland mum and the attempted murder of her husband while the couple were defending their home on Boxing Day night.

Queensland Police Superintendent John Hallam says 41-year-old Emma Lovell and her 43-year-old husband Lee were attacked after confronting the 17-year-olds who had allegedly broken into their North Lakes house about 11.30pm on Monday.

Ms Lovell was stabbed in the chest and he was stabbed in the back, and both were rushed to hospital, but she died not long after being admitted.

Lee Lovell on Tuesday spoke of devastation at the "senseless" death of his wife.

"She was such a beautiful person. I am, we're all just devastated from the loss. It's senseless and I don't know what people do it for," he told Seven News.

"We were confronted with a horrific scene, paramedics did all they possibly could, but unfortunately, the lady passed away when she was admitted to the hospital," Supt Hallam told reporters.

Police dog squad officers caught four males, aged 18, 16 and two aged 17 nearby about four hours later.

The two 17-year-olds, from Zillmere and Holland Park, have been charged with murder, attempted murder and entering a dwelling with intent on Tuesday.

They've been refused bail and are set to appear in Brisbane Childrens Court on Wednesday.

The oldest and youngest males, who were also arrested, are still being questioned by detectives.

Supt Hallam the four males had no links to the Lovells, and the reason they allegedly entered their home and alleged murder weapon are still being probed.

"They (the couple) disturbed the offenders inside the dwelling, they were woken by ... barking dogs," he said.

"They disturbed them (the pair) inside the dwelling, and yes they (the Lovells) were defending their house."

Neighbours heard and saw two girls, believed to be the Lovells' daughters, screaming "someone help my Mum" as paramedics tried to save the woman, the Brisbane Times reported.

The day before the incident, the Lovell family had enjoyed a Christmas outing at Point Cartwright on the Sunshine Coast.

"So for the 1st time in 11 years we spent Christmas day on the beach, even managed to cook up some bacon and eggs! Hope everyone has a great Christmas day spent with loved ones and friends," Mr Lovell wrote in a Facebook post.

Supt Hallam said the Lovell family were "absolutely traumatised and shattered" by the loss of their wife and mother, and the broader community was in mourning.

"This is a terribly sad day that someone's life has been taken in this way; I still struggle to understand why these types of violent crimes occur, and it's occurred again, and we need to work together as a community to say no to this type of violence," he added.

"And also support each other when it occurs and do something to try and defer or deter people from committing those types of offences."

© AAP 2022

Three Victorians and a South Australian woman have drowned in a deadly weekend on Australian waterways.

A 17-year-old boy died near Mordialloc in Melbourne's south on Monday afternoon, while another man aged in his 30s drowned at a lake in Ebden in Victoria's northeast earlier in the day.

In South Australia a 73-year-old woman could not be revived after she was pulled from the water at Seacliff, south of Adelaide on Monday evening.

The three Boxing Day deaths come after a 19-year-old Melbourne man drowned on Christmas Day at Lorne in Victoria's southwest.

The deaths were a tragic reminder for people to stay vigilant around the water, Life Saving Victoria director Kane Treloar said.

"We understand that people want to come to the beach. It's been a long time since we've had the opportunity to enjoy the waterways with our family," he told reporters on Tuesday.

"We're asking people to think about their safety because we want to make sure everyone's coming home at the end of the day."

There have been at least three other serious incidents across Victoria over the Christmas break including one involving a toddler at Ocean Grove, according to Mr Treloar.

On Boxing Day night, two girls were rescued by police officers and a good Samaritan at St Kilda Beach in Melbourne's southeast.

The sisters, aged 10 and 11, were struggling in waters off the pier when Acting Sergeant Samantha Christian, Leading Senior Constable Emma Sharp and a passerby named Tyler came to their rescue.

"The current was so strong that I think it picked them up before they actually realised what was going on," Lead Sen Const Sharp told reporters.

Tyler quickly managed to save one girl but the other was trapped in an undertow, forcing the offers to perform a difficult and dangerous rescue.

"It was very hectic in the water," Act Sgt Christian added.

"Just to know that the girls were out of that situation and back with their mum was really, really good."

They were assessed by paramedics but did not need to go to hospital.

Elsewhere, a young girl is being treated in a Sydney children's hospital after being pulled from a pool in Wentworth Park on Monday evening.

And in South Australia, six stand-up paddle boarders were rescued after being swept out to sea at Moonta Bay on the Copper Coast on Monday night.

A passing boat saw them swimming with their boards about two kilometres offshore and picked them up.

One had ingested a large quantity of water and was taken to the Wallaroo Hospital for further treatment.

People should mindful of the potential dangers of using flotation devices, including stand-up paddle boards and inflatables in the ocean, SA Police said.

"They are highly susceptible to winds and may be carried out to sea," police said in a statement on Tuesday.

© AAP 2022

Three Victorians and a South Australian woman have drowned in a deadly weekend on Australian waterways.

A 17-year-old boy died near Mordialloc in Melbourne's south on Monday afternoon, while another man aged in his 30s drowned at a lake in Ebden in the Victoria's northeast earlier in the day.

A 73-year-old South Australian woman could not be revived after she was pulled from the water at Seacliff, south of Adelaide, on Monday evening.

The three Boxing Day deaths come after a 19-year-old St Albans man drowned on Christmas Day at Lorne in Victoria's southwest.

Both Victorian and SA police say they will prepare reports for the coroner.

The deaths were a tragic reminder for people to stay vigilant around the water, Life Saving Victoria director Kane Treloar said.

"We understand that people want to come to the beach. It's been a long time since we've had the opportunity to enjoy the waterways with our family," he told reporters on Tuesday.

"We're asking people to think about their safety because we want to make sure everyone's coming home at the end of the day."

There have been at least three other serious incidents across Victoria during the Christmas break, including one involving a toddler at Ocean Grove, Mr Treloar said.

He said the non-fatal drownings should not be discarded.

"These are instances where people are going to go to hospital and their lives are going to be changed forever," Mr Treloar said.

"Their lives of their families are going to be changed forever, even though they have survived a traumatic event."

Two Victorian children were rescued by police officers at St Kilda Beach in Melbourne's southeast.

The girls, aged 10 and 11, were seen struggling in waters off the pier on Monday evening when the mounted branch officers came to their rescue.

They were assessed by paramedics but did not need to go to hospital.

Elsewhere, a young girl is being treated in a Sydney children's hospital after being pulled from a pool in Wentworth Park on Monday evening.

And in South Australia, six stand-up paddle boarders were rescued after being swept out to sea at Moonta Bay on the Copper Coast on Monday night.

A passing boat saw them swimming with their boards about two kilometres offshore and picked them up.

One had ingested a large quantity of water and was taken to the Wallaroo Hospital for further treatment.

People should mindful of the potential dangers of using flotation devices, including stand-up paddle boards and inflatables in the ocean, SA Police said

"They are highly susceptible to winds and may be carried out to sea," police said in a statement on Tuesday.

© AAP 2022

Three Victorians and a South Australian woman have drowned in a deadly weekend on Australian waterways.

A 17-year-old Pakenham boy died near Mordialloc, south of Melbourne, on Monday afternoon.

He was found unresponsive in the water after an extensive air search but could not be revived.

Earlier in the afternoon, another Victorian man drowned at a lake in Ebden in the state's northeast.

Onlookers saw the man, believed to be aged in his 30s, struggling in the water after chasing his dog at Kookaburra Point.

He was pulled to shore and taken to hospital but he later died.

A 73-year-old South Australian woman drowned at Seacliff, south of Adelaide, about 7pm on Monday.

She was pulled unconscious from the water and could not be revived.

The three Boxing Day deaths come after a 19-year-old St Albans man drowned on Christmas Day at Lorne in Victoria's southwest.

Both Victorian and SA police say they will prepare reports for the coroner.

Meanwhile, two young Victorian girls were rescued in a near-drowning at St Kilda Beach in Melbourne's southeast.

The girls, aged 10 and 11, were seen struggling in waters off the pier on Monday evening when mounted branch officers came to their rescue.

The girls were assessed by paramedics but did not need to go to hospital.

But a young girl is being treated in a Sydney children's hospital after being pulled from a pool in Wentworth Park on Monday evening.

People at the scene performed CPR on her before paramedics arrived and continued treatment, NSW Ambulance said.

A helicopter ambulance team also arrived but the girl was taken by road to Westmead Children's Hospital.

Life Saving Victoria is reminding people to stay vigilant around the water.

"Please, make safe decisions whenever you are in, on or around water, such as never swimming alone, ensuring children are actively supervised," the organisation's general manager lifesaving services Liam Krige said.

© AAP 2022