Embassies of Syria are being attacked around the world, and the Syrian embassy in Canberra took the latest assault Saturday.

A group of around 40 men broke into the Syrian embassy in O'Malley at about 9:30pm (AEDT), while there were three employees inside.

ABC News reported the upset men smashed everything in their sight in the embassy.

This developed as the governments of Russia and China vetoed a UN Security Council resolution calling on Syrian president Bashar al-Assad to stand down, ABC reported.

Embassy superintendent Mick Calatzis told ABC three embassy staff took refuge in the basement to stay safe.

"We are obviously concerned about it and three staff members from the embassy were present when the men forced entry. However, no-one was injured."

Superintendent Calatzis says ACT Policing, federal police and other Commonwealth agencies are all investigating.

"The foreign government of Syria is a representative here in Australia... and they have very much cooperated with us as well," he said, adding that Syria is aware that Australia has is conducting its investigation.

Syrian embassies in London, Berlin, Cairo and Kuwait among others have all come under attack from protesters in recent days, ABC repoerted.