Protesters clashed with police in Athens on Friday during a demonstration against a new education law, according to local media.

About 3,000 people affiliated with school teachers’ unions marched in protest of the legislation, according to the daily Kathimerini.

Police used tear gas and water cannons to stop the crowd, which was blocking a main road in the capital.

The unions are protesting the law, which makes teacher and school evaluations mandatory. They also voiced discontent at a court ruling Thursday that prohibited the strike.

Roadblocks were set up on several major streets in Athens to prevent demonstrators from blocking them.

No arrests have been reported.

On Thursday, Education Minister Niki Kerameus sued the two unions affiliated with private and public school teachers over the plan to strike, which she said was illegal./aa