(Image: GETTY )

The gang of 10 smashed the entrance window with the weapons and rushed the building.

They then splashed red and black paint onto the facade before fleeing the scene when a security guard called police.

It is reported no arrests have been made at this stage.

An anarchist collective Rouvikonas, the Greek word for Rubicon, has claimed responsibility for the attack, reports ekathimerini.com.

According to the group, it was carried out in response to the activities of a Canadian mining company in northern Greece.

CCTV footage showed the group of attackers had their faces covered and parked their motorbikes at a supermarket around 150 metres away.

Cops reportedly questioned one man in the area but he is understood to have been released.

The country’s foreign ministry have condemned the attack and said it would not impact the “enduring friendship” between Greece and Canada.

Rouvikonas have conducted similar raids on the embassies of Iran, Israel and Saudi Arabia along with targeting government offices and foreign companies.

A neighbourhood of the historic city Exarcheia is famous for being the historical centre of political anarchy in Athens.