Greece ? Police fired tear gas and clashed with demonstrators Friday as violence erupted during a rally marking the anniversary of a 1973 student uprising. At least 10 people were injured and dozens detained.

Rioters hurled flares and rocks at police near the prime minister’s official residence as others marched around the U.S. Embassy, authorities said.

Up to 7,500 police were deployed, most along the traditional route that takes demonstrators from the Athens Polytechnic campus to the U.S. Embassy.

Some 15,000 demonstrators participated in the march, joined by trade union members who had staged strikes this year for higher pay, including a six-week walkout by school teachers.

This year marks the 33rd anniversary of the uprising, when several students lost their lives after the military junta then ruling Greece used tanks against them. The events that night are generally considered to mark the beginning of the end of the junta that ruled Greece from 1967-74.