ATHENS (AP) — Thousands of police officers are being deployed in Athens during protests planned for the Saturday anniversary of a 1973 student uprising that was bloodily suppressed by a military dictatorship.

Scuffles broke out on Friday as anti-government protesters prevented a delegation from Greece’s governing Syriza party from laying a wreath at a memorial to the dead at the site of uprising, Athens Polytechnic complex. No injuries were reported.

The anniversary commemoration culminates Saturday with a march from the Polytechnic, to the embassy of the United States, which many Greeks accuse of aiding the 1967-74 military regime. These marches often degenerate into battles between far-left demonstrators and police.

About 5,000 police will monitor for Saturday’s march.

The precise number of deaths in the uprising is unknown. Estimates range from 18-40.

Carnations are placed on the remains of a metal gate crumpled by a tank during the brutal 1973 military crackdown on a student pro-democracy rising, at the Polytechnic technical university in Athens, on Friday, Nov. 16, 2018. Thousands of police are being deployed in Athens to keep the peace during planned protests on the anniversary of a student uprising that was bloodily suppressed by a military dictatorship in 1973. (AP Photo/Petros Giannakouris)