NEW YORK (CBSNewYork) — Police released a surveillance image Friday evening of a suspect who slashed a man in the back of the head in Midtown East a day earlier.

Officers were called to 55th Street and Madison Avenue at 4:47 p.m. Thursday, after the 30-year-old man was slashed in the back of the head by a man he did not know, police said.

READ MORE: CNN's Chris Cuomo Suspended Indefinitely Over Extent Of Help To His Brother During Scandal

The assailant fled the scene, police said.

READ MORE: 16-Year-Old Shot In The Bronx

The victim was rushed to Mount Sinai West hospital, where he was treated and released, police said.

Detectives obtained surveillance video of a suspect, from which they released an image.

MORE NEWS: 3 Killed, 8 Injured In Shooting At Oxford High School In Michigan

Anyone with information was asked to call the NYPD Crime Stoppers at (800) 577-TIPS, log onto the Crime Stoppers website, or text tips to 274637 (CRIMES) and enter TIP577.