Police are asking for the public's help to identify a man accused of grabbing a 12-year-old boy, placing him in a chokehold and stealing his cellphone last weekend in Brooklyn.

Investigators on Saturday released a sketch of the suspect.

The boy was walking along Sutter Avenue in the Brownsville neighborhood last Sunday afternoon when he was grabbed from behind and dragged into an apartment building near Mother Gaston Boulevard, police said.

While restraining the boy in a chokehold, the man pulled the boy's Apple iPhone from his pocket and fled, police said.

The boy was treated for a minor leg injury at Brookdale University Hospital and Medical Center.

Anyone with information about the identity of the suspect is asked to call the NYPD Crime Stoppers Hotline at 1-800-577-TIPS.