Thirty-one (31) people were arrested in Athens and Thessaloniki late Wednesday in violence that broke out during demonstrations marking the 37th anniversary of the November 17, 1973 Polytechnic students' uprising that led to the collapse of the dictatorship in Greece.

A total of 69 persons were taken in for questioning by police, of which 23 were arrested and will appear before a public prosecutor on Thursday.

Another 8 persons were arrested by police in Thessaloniki in similar incidents.

According to Thessaloniki police, six of the detainees are charged with throwing molotov cocktails, stones and other objects at policemen, while the other two were arrested for possession of airguns during preventive checks held ahead of the demonstration.