And there are fears more bombings could occur.

"Australian condemns the evil, the calculated and inhuman attacks that were undertaken in Kabul overnight on the innocent and on the brave," Prime Minister Scott Morrison told reporters on Friday.

"We join with our American and Afghan friends in mourning their terrible and awful loss."

The blasts, attributed to terrorist organisation Islamic State Khorasan, killed more than 60 civilians and 13 US military personnel.

Over a period of nine frantic days, Australian forces were able to evacuate 4100 people out of Taliban-held Kabul, thanks to the presence of American and British defence forces guarding the airport.

The evacuees included around 3200 Australians and visa holders and 800 people from coalition partner countries.

There are currently 2500 people staying at Australia's Dubai air base and 783 have either come to Australia or other countries.

Foreign Minister Marise Payne warned of a high threat of further terror attacks, meaning Australian evacuation flights had ceased.

"We know that this is a very distressing situation for Australians still in Kabul, for people with visas and for families and friends who are here in Australia," Senator Payne said.

Mr Morrison said further opportunities to get remaining Afghan visa holders out would be "very restricted".

People were warned not to travel to Kabul airport but move to a safe location and register with the Department of Foreign Affairs and Trade if they had not already done so.

Lawyer Glenn Kolomeitz said about 1000 embassy guards, interpreters and their families who helped Australian forces remained in Afghanistan.

He served in Afghanistan and represents hundreds of Afghans entitled to protection in Australia.

As far as he knew, none of his clients were caught up in the bombings.

An interpreter family got through the airport gates just before the attacks.

Defence Minister Peter Dutton signalled Australia would offer assistance to any US mission to hunt down the people behind the attacks.

"Australia has worked alongside the United States in every major battle in modern history and we will continue to work with the American allies," he said.

"We've stood by them through thick and thin and we will continue to do that into the future."

Federal Labor held grave concerns for Australian citizens and visa holders still in Afghanistan who could no longer travel safely to Kabul airport.

"This was a despicable act against Afghans seeking security and those who were helping them," opposition leader Anthony Albanese said in a statement with foreign affairs spokeswoman Penny Wong and defence spokesman Brendan O'Connor.

"We grieve with the people of Afghanistan today. We grieve with our US allies - their work has saved many thousands of people."

Australian Associated Press