Received

Gunman Nathaniel Train was a wanted man and police had repeatedly visited the isolated Queensland compound where six people including two officers were shot dead, looking for him.

A warrant was issued for Train's arrest after the former school teacher crossed the Queensland border during the COVID-19 pandemic on December 17 last year armed with multiple registered firearms.

His brother Gareth Train's only history with Queensland Police was an offence of unlawful possession of a firearm dating back to 1998.

Stacey Train had no criminal history.

All three were killed in a gunfight with police at the Wieambilla property on December 12, following the shooting deaths of constables Rachel McCrow and Matthew Arnold, and neighbour Alan Dare.

"We knew very little about the Trains and there was nothing that would have caused a particular flag for our members who attended on that day," Deputy Police Commissioner Tracy Linford said on Thursday.

Earlier in the day, Queensland coroner allowed investigators to release limited facts about the ongoing investigation at a special briefing.

Police subsequently confirmed Nathaniel Train was wanted after becoming bogged crossing into Queensland, damaging a border gate before leaving two guns behind during the December 17, 2021 incident.

"Police did try and go to the property to locate him to have a discussion with him about ... that day and why he was crossing the border, and why he left two firearms behind," Ms Linford said.

Their initial attempts, in August this year, were unsuccessful.

"There was nothing to indicate to them that Nathaniel was at that address," she said.

The four constables who attended the Wieambilla compound on December 12 were able to identify there was an outstanding warrant relating to the December 2021 incident.

They were sent there after a missing person's call from Nathaniel Train's wife to NSW police, who sent a request to QPS.

Ms Linford said it was a "run-of-the-mill" request for the police.

"We didn't have any flags that raised concern to us about these individuals. They're not somebody who was on our watch list."

Detectives are still to determine a motive for the shooting deaths of constables McCrow and Arnold and the attack on their two colleagues, and are examining links to online extremist conspiracy groups.

"We're creating a timeline of everything we knew in our policing system," Ms Linford said.

"We're trawling through their bank accounts, looking at what purchases they made.

"There were postings to particular social media sites but we haven't found any connection to any particular issue, motivated group."

Police have also confirmed six firearms have been seized from the Wieambilla property - two registered to Nathaniel Train, three unregistered and one of unknown ownership.

Compound bows and arrows, and knives were also found.

The details come a day after a moving ceremony to farewell the two fallen offices where Police Chaplain Jeffrey Baills encouraged people to seek help if they were in need.

"We have had a major attack on the police in Queensland but, ladies and gentlemen, I want to say to us today: We will not be broken," he said.

The two officers were awarded valour medals at the ceremony that followed their tragic deaths on December 12.

© AAP 2022

US President Joe Biden has stood alongside Ukraine's Volodymyr Zelenskiy at the White House to urge Americans and the world to keep supporting Kyiv in 2023 as the Ukrainian leader made his first foreign wartime visit.

Zelenskiy presented Biden with a Ukrainian medal offered by a captain of a HIMARS rocket unit and expressed gratitude for the US president's role in helping Ukraine and rallying support.

The United States has sent about $US50 billion ($A75 billion) in assistance to Kyiv as Europe's biggest land conflict since World War II drags on, killing tens of thousands of people, driving millions from their homes and reducing cities to ruins.

But some Republicans, who will take control of the House of Representatives next year, have expressed concerns about the price tag, and European countries have suffered due to energy problems and the hit to the global economy.

"As we head into the New Year, it's important for the American people, and for the world, to hear directly from you Mr President about Ukraine's fight and the need to continue to stand together through 2023," said Biden at a news conference on Wednesday.

Biden said he had never seen NATO nor the EU more united than about Ukraine.

"The United States will stand up for our shared values, the values of freedom," said Zelenskiy, wearing his trademark olive green pants and sweater.

"I believe that despite any changes in the composition of Congress, bicameral and bipartisan support will be maintained."

Earlier, Biden and first lady Jill greeted Zelenskiy on the White House lawn before the two leaders spoke at the Oval Office.

Zelenskiy, who will seek more support during the trip, is due to address a joint session of the US Senate and House of Representatives and meet Republican leaders there.

Some in Moscow expected the campaign to achieve a rapid victory. But the conflict is passing its 300-day milestone.

On Wednesday, US Secretary of State Antony Blinken announced the US would provide another $US1.85 billion ($A2.76 billion) in military aid for Ukraine including a Patriot air defence system to help it ward off barrages of Russian missiles.

Ukraine has come under repeated Russian missile and drone strikes targeting its energy infrastructure, leaving millions of people without electricity or running water in the dead of a freezing winter.

The Patriot missile is deemed to be one of the most advanced US air defence systems, offering protection against attacking aircraft as well as cruise and ballistic missiles.

Putin was defiant on Wednesday at an end-of-year meeting of top defence chiefs, saying Russian forces were fighting like heroes in Ukraine, would be equipped with modern weapons and would achieve all Moscow's goals.

Putin said there were no financial limits on what the government would provide in terms of equipment and hardware, but the army had to learn from and fix the problems it had experienced in Ukraine.

He gave his backing to a plan by his defence minister to boost the size of the armed forces by more than 30 per cent to 1.5 million combat personnel.

© RAW 2022

President Volodymyr Zelenskiy has told the US Congress that aid to Ukraine is an investment in democracy, not charity, and invoked American victory over the Nazis in a key World War II battle to press for continued assistance.

Zelenskiy, on his first foreign wartime visit, wore his trademark olive green pants and jumper. He earlier met US President Joe Biden, who urged support to keep flowing in 2023, when congressional approval for Ukrainian aid will be harder.

The United States has sent about $US50 billion ($A75 billion) in assistance to Kyiv as Europe's biggest land conflict since 1945 drags on, killing tens of thousands, driving millions from their homes and reducing cities to ruins. On Wednesday, it pledged to provide Patriot missiles.

But some Republicans, who will take control of the House of Representatives from Democrats on January 3, have expressed concerns about the price tag. They could hold up billions of dollars in war aid starting next month.

"Your money is not charity. It is an investment in the global security and democracy that we handle in the most responsible way," Zelenskiy told a joint session of the US Senate and House of Representatives, speaking in English.

The world was too interconnected to allow any country to stand aside and feel safe, he added.

Zelenskiy's speech was aimed at softening the concerns of Republicans when they take over Congress and keeping US public opinion on his side with reminders of the hardships his people face.

Members of Congress stood, cheered, applauded and shook Zelenskiy's hand as he entered the chamber, with several wearing the colours of the Ukrainian flag, blue and yellow.

He received multiple standing ovations from an audience that also included members of the Ukrainian diaspora and religious figures.

Referencing former US President Franklin D Roosevelt, who served between 1933 and 1945, and efforts to liberate Europe from Nazi occupation, Zelenskiy also appealed to Americans as they gathered with family for Christmas.

"Just like the brave American soldiers, which held their lines and fought back Hitler's forces during the Christmas of 1944, brave Ukrainian soldiers are doing the same to Putin's forces this Christmas," he said.

The Battle of the Bulge, which began in December 1944, was Hitler's final major attempt to push back Allied forces. Poor weather hampered initial US efforts to halt the offensive, leading to fatalities and threatening to divide the allies, who ultimately prevailed.

Earlier, Zelenskiy was greeted by Biden and first lady Jill Biden on the White House lawn and the two leaders appeared together at the Oval Office, followed by a news conference.

"As we head into the New Year, it's important for the American people, and for the world, to hear directly from you Mr President about Ukraine's fight and the need to continue to stand together through 2023," Biden said.

Zelenskiy said: "The United States will stand up for our shared values, the values of freedom."

US Secretary of State Antony Blinken also announced the United States would provide another $US1.85 billion ($A2.76 billion) in military aid for Ukraine including the highly advanced Patriot air defence system to help it ward off barrages of Russian missiles.

The Patriot missile is deemed to be one of the most advanced US air defence systems, offering protection against attacking aircraft as well as cruise and ballistic missiles.

Zelenskiy has repeatedly called on the West to supply more advanced weaponry, ranging from modern battle tanks to missile defence systems, but Western allies have been cautious, keen to minimise any risk of provoking wider conflict with Russia.

© RAW 2022