A man pepper-sprayed and shoved a stranger into a storefront gate during an apparently random attack in Brooklyn, surveillance footage released Friday by police shows.

The 33-year-old victim was standing in front of a butcher shop on 16th Avenue near 51st Street in Borough Park around 9:30 a.m. Monday when the attacker suddenly approaches him from behind, cops said.

The attacker sprays the victim with pepper spray and then pushes him into the gate, the footage shows.

A good Samaritan tried to intervene, but the attacker pulled out an expandable baton and swung it at him before fleeing in a white SUV, police said.

The victim was taken to Maimonides Hospital, treated for cuts to his face and released, cops said.

It was unclear what prompted the attack, cops said.

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