BROOKLYN - The NYPD is investigating a string of anti-Semitic hate crimes in Crown Heights.

Police released surveillance video of the most recent incident Sunday night when a 20-year-old Jewish man was punched by someone who was walking with a group of people. They say the attack was unprovoked and nothing was stolen.

According to authorities, there have been seven incidents in the neighborhood since September, including assaults on Jewish people and anti-Semitic graffiti.

The NYPD's Hate Crime Task Force says the incidents do not appear to be related at this time. No arrests have been made.