Australia considering attacking Syria with US

US President Donald Trump has called for "civilised nations" to join in his campaign on Syria - and Australia may join the attacks.

Speaking to Australia's 3AW radio on Friday morning, Australian Prime Minister Malcolm Turnbull said Syrian President Bashar al-Assad's chemical attacks on his own civilians "cries out for a strong response".

Mr Turnbull said he had spoken to his Defence Minister and the Australian Chief of the Defence Force - but wouldn't comment on any Australian military action.

"I don't want to speculate any further about that. You know where we stand. We have condemned this attack, utterly," he said.

"It cries out for a strong response and we are in very close touch, as we always are, constant communications with our allies, in particular the United States."

Australian Defence Minister Marise Payne spoke to the ABC radio on Friday morning and signalled Australia would be "part of the conversation" on any US military campaign.

"We have to be clear with Russia, we have to be clear with those who support the regime that this is totally unacceptable," Ms Payne said.

"The UN Security Council, I understand, is considering the options that are available to it and we would call on them to take action in response to that."