GRAVESEND, Brooklyn (PIX11) — A group of males allegedly attacked and robbed a 13-year-old boy aboard a Brooklyn train earlier this month, police said Tuesday.

The victim was on the Manhattan-bound F train approaching the Avenue P station when the group allegedly punched him in the head several times before taking his backpack and cellphone, police said. The incident occurred on Oct. 3 at around 4 p.m.

The teen suffered facial swelling and bruising and was taken to the hospital in stable condition, police said. The suspects fled the scene in an unknown direction.

There have been no arrests. The NYPD released a photo of the suspects but no descriptions were provided.

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting crimestoppers.nypdonline.org, downloading the NYPD Crime Stoppers mobile app, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).