Ukrainian President Volodymyr Zelenskiy has continued his appeals to leaders of the Group of Seven nations for more air defence capabilities as the G7 vowed to support Kyiv for "as long as it takes".

NATO said it was closely monitoring Russia's nuclear forces following a string of Russian battlefield defeats in Ukraine and that the allies were also boosting security around key infrastructure after recent attacks on Baltic Sea gas pipelines.

Russian missiles again hit Ukrainian cities but with less intensity than on Monday, when dozens of strikes killed 19 people, wounded more than 100 and knocked out power across the country in Moscow's biggest aerial offensive since the start of its invasion on February 24.

More missile strikes killed at least one person in the southeastern Ukrainian town of Zaporizhzhia and left part of the western city of Lviv without power, local officials said. Air raid sirens earlier wailed across Ukraine for a second day.

"When Ukraine receives a sufficient quantity of modern and effective air defence systems, the key element of Russia's terror, rocket strikes, will cease to work," Zelenskiy told G7 leaders at a virtual meeting on Tuesday, where he again ruled out peace talks with Russian President Vladimir Putin.

Ukraine on Tuesday received the first of four IRIS-T air defence systems Germany promised to supply, a German defence ministry source said.

The White House later said the United States was speeding up the shipment of sophisticated NASAMS air defenses to Ukraine. Washington has already provided more than $US16.8 billion ($A26.8 billion) worth of security aid to Ukraine during the war.

Zelenskiy's government has mixed gratitude for such aid with continued pleas for more powerful weapons and faster deliveries.

US Treasury Secretary Janet Yellen called on allies to swiftly disburse current commitments to Ukraine.

The G7 - which groups the United States, Germany, France, Japan, Britain, Italy and Canada - pledged continued "financial, humanitarian, military, diplomatic and legal support ... for as long as it takes" to Ukraine, it said in a statement.

It also condemned "indiscriminate attacks on innocent civilian populations" as war crimes and said Putin would be held to account for them.

Putin was a "rational actor who has miscalculated significantly", US President Joe Biden said in a CNN interview.

Moscow, which calls its actions in Ukraine a "special military operation" to eliminate dangerous nationalists and protect Russian speakers, has accused the West of escalating and prolonging the conflict by supporting Kyiv.

"We warn and hope that they realise the danger of uncontrolled escalation in Washington and other Western capitals," Russian Deputy Foreign Minister Sergei Ryabkov was quoted as saying by RIA news agency on Tuesday.

Kyiv and its Western backers accuse Russia of an unprovoked land grab in Ukraine.

Russian Foreign Minister Sergei Lavrov said Moscow was open to talks with the West, a claim Washington dismissed as "posturing" because Russia has continued to strike Ukrainian cities.

In an interview on state television, Lavrov said Russia was willing to engage with the United States or with Turkey on ways to end the war, now in its eight month, but had yet to receive any serious proposal to negotiate.

Putin, under domestic pressure to ramp up the war as his forces have lost ground since early September, said he ordered Monday's strikes as a response to a deadly explosion that damaged Russia's bridge to annexed Crimea last weekend.

In recent weeks, Moscow has annexed new tracts of Ukraine, mobilised hundreds of thousands of Russians to fight and repeatedly threatened to use nuclear arms, stoking alarm in the West. A European diplomat said NATO was considering convening a virtual summit of the alliance to consider its response.

NATO has not noticed any change in Russia's nuclear posture following the threats, secretary-general Jens Stoltenberg told reporters in Brussels on Tuesday.

Stoltenberg also said NATO allies would meet any attacks on critical infrastructure with a "united and determined response".

© DPA 2022

King Charles III will be crowned at London's Westminster Abbey next May in a ceremony set to follow the traditional pageantry used for anointing monarchs over the last 1000 years, Buckingham Palace says.

Charles, 73, automatically became king on the death of his mother Queen Elizabeth last month but the grand coronation ceremony for him and his wife Camilla, who will be crowned Queen, will now take place on Saturday, May 6.

"The coronation will reflect the monarch's role today and look towards the future while being rooted in longstanding traditions and pageantry," the palace said in a statement.

The ceremony, a solemn and religious event which will be conducted by the Archbishop of Canterbury, the spiritual head of the Anglican Communion, usually comes several months after the accession of the new monarch.

Kings and queens of England, and later Britain and the United Kingdom, have been crowned at Westminster Abbey since William the Conqueror in 1066.

Charles is the 41st monarch in a line that traces its origins back to William, and he will be the oldest monarch to be crowned.

His mother, who died aged 96 at her Scottish holiday home, holds the record for the longest reign at 70 years.

UK media have reported that Charles wants to scale down some of the customary grandeur around the coronation, mindful that it would come as the country grapples with a cost of living crisis.

The palace said it would maintain the "core elements" of the traditional ceremony "while recognising the spirit of our times".

Elizabeth's coronation as Queen on June 2, 1953, was the first to be televised and was regarded as a milestone in modernising the monarchy, a move that her husband Prince Philip was said to have pushed for strongly.

The Abbey, whose royal links are extensive, was the setting for Elizabeth's funeral service and it was also where the King's son and now heir, Prince William, married his wife Kate.

May 6 is also the birthday of the Duke and Duchess of Sussex's son Archie - the King's grandson - who will be turning four on the day.

Guest lists have yet to be confirmed for the spectacle, including whether or not Harry and Meghan will be invited or be able to travel from the US to attend.

The date was also the wedding anniversary of the late Queen's sister Princess Margaret.

Charles is king and head of state not only of the United Kingdom but of 14 other realms including Australia, Canada, Jamaica, New Zealand and Papua New Guinea.

with PA

© RAW 2022

Almost 200,000 people who spent years fighting to clear welfare debts they didn't owe will have any active Centrelink investigations wiped.

The federal government will scrap the cases of robodebt victims still under review, with any potential debt no longer being pursued.

The unlawful debt recovery scheme started in 2015 and falsely accused welfare recipients of owing money to the government.

More than $750 million was wrongfully recovered from 381,000 people.

Social Services Minister Amanda Rishworth said clearing the outstanding cases would offer certainty to any Australians with reviews hanging over their heads.

Ms Rishworth said pursuing the cases would be expensive and time-consuming, and would undermine public confidence in the welfare system.

"The robodebt fiasco is something that should be of deep concern to all Australians. We know it had a significant human cost," she said.

A royal commission into the robodebt scheme will begin public hearings at the end of October.

© AAP 2022

Images of death and debris still haunt the memory of families who lost loved ones in the Bali bombings two decades ago.

The nation is commemorating the more than 200 people killed - including 88 Australians - when terrorists detonated bombs near popular nightclubs in Kuta on October 12, 2002.

Dale Atkin was one of the more than 200 wounded and the journey back has pushed him to his limits.

What should've been a carefree night at the Sari Club ended with burns to almost half his body.

The burns were half a cricket ball deep, and his chances of survival slim.

The roof of the Bali hut collapsed on him and and his friends, forcing them to crawl out surrounded by fire and debris.

"I will always pay my respects to the people who died however it could have been much worse," said Mr Atkin, who is now aged 47.

It took him more than a decade to finally see a counsellor and was diagnosed with post-traumatic stress disorder.

He was also plagued by survivor's guilt.

"I wasn't fine. I could tell you where every single flame was in detail as I was reliving it every day," he said.

His wife Katie and three children became the motivation he needed to pull himself from the depths of despair.

Two decades on, he's still encouraging others affected by the traumatic event to speak up and get the help they need.

"I want everyone to know there's no shame in it," Mr Atkin said.

Commemorative services will take place across the nation for the anniversary.

Prime Minister Anthony Albanese will attend a memorial at the Coogee Dolphins rugby league club in Sydney, from which 11 players travelled to Bali but only five made it home.

A memorial service will be held at Parliament House in Canberra on Wednesday, with Australian flags expected to be flown at half mast across the country.

A twilight service will be held at Allambe Memorial Park on the Gold Coast, which features a bronze plaque with the names of the 88 slain Australians.

Among those names is Robert Thwaites, whose parents initiated the Indonesian-style memorial after their son was killed in the bombings.

His father Geoff said the memory has become no easier, 20 years on.

"Bob was 25. He had a bright future ahead of him," he said.

"It doesn't change how you feel but time gets away from you."

© AAP 2022