NEW YORK - Police are investigating a hate crime in New York City.

Cops are looking for a suspect accused of throwing rocks into the front window at the Ramaz Middle School on the Upper East Side.

It happened just before 9:30 p.m. Wednesday.

Police say the suspect hid the rocks in his backpack.

No one was hurt.

Anyone with any information is asked to call the NYPD's Crime Stoppers hotline at 1-800-577-TIPS (8477), or for Spanish, 1-888-57-PISTA (74782). You can also submit a tip via their website or via DM on Twitter, @NYPDTips. All calls are kept confidential.