A small bomb has exploded in Piraeus, outside the Greek offices of Israel’s main container shipping firm ZIM on Wednesday.

According to The Times of Israel, local police reported that minor damage was caused by the blast with no reports of injury.

Police also said that leaflets reading pro-Palestine messaging were scattered at the scene.

The explosive device was a makeshift bomb according to Maritime Executive, made with gas canisters that caused minor damage to the exterior of the building.

Six people were arrested and questioned but were released not long after, as police continue to investigate the bombing.

The building is also said to house the offices of the Diaplous Group, a Greek maritime security company.

This blast is the second in just as many months at a shipping office in Piraeus.

In December last year, a bomb exploded near the front entrance of an office building that is home to several smaller shipping companies, a maritime satcom provider, a freight forwarder and the Greek office of a leading P&I club, among others.

The damage appeared restricted to the ground floor and lobby of the seven-story building.

Since the beginning of the Israel-Hamas war, ZIM has banned and blocked in several overseas ports and has been threatened by Houthi rebels in the Red Sea.

In Melbourne, ZIM containers on trucks have been disrupted by protestors