Police are searching for four people they say are responsible for beating and robbing a 15-year-old boy in Coney Island.

The teen entered 2832 West 23rd St. on Jan. 16 just before 5 p.m., to sell a jacket to a person he met on social media.

Instead, the group approached the boy, demanded he hand over his belongings and threatened to stab him, according to authorities.

The robbers pushed the boy and punched him in the face before forcing him into a staircase where they stole his jacket, two cellphones and other personal items.

Police say EMS treated the boy at the scene for minor injuries.

Anyone with information is urged to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477).