Malcolm Turnbull says Australia's prayers are with the family of a police officer shot dead on Paris' Champs Elysees.

The prime minister said the shooting - which left one dead and two wounded - had all of the hallmarks of a terror attack.

"But at this stage I'm advised that the French prosecutor is on the scene and they'll obviously be making further announcements as they investigate the crime," he told the Seven Network on Friday.

Mr Turnbull urged Australians to pay close attention to travel advisories from foreign affairs officials.

"Everywhere - but especially in Europe at the moment - pay close attention to your surroundings.

"Be alert, but above all follow that travel advisory, because it is updated all the time in the light of events.."