Police have clashed with protesters in Thessaloniki during a demonstration against the agreement reached by Greece and Macedonia to resolve the name dispute.

The video shows police firing tear gas at protesters in an attempt to disperse them.

The riots broke out as Prime Minister Alexis Tsipras attended an international trade fair in the northern city.

According to reports, more than 16,000 people demonstrated in Thessaloniki against the government's controversial planned name deal with neighbouring Macedonia, which would see the former Yugoslav nation's name changed to the Republic of North Macedonia.