VALRICO — Deputies are looking for a man who, for no apparent reason, knocked on the door of a home then punched the man who answered.

The Hillsborough County Sheriff's Office on Friday released surveillance video of the assault.

The attacker, wearing a blue T-shirt, baseball hat, jeans and tennis shoes, knocked on the door of a home on Folklore Drive just before 3 p.m. Saturday.

The victim opened the door, two dogs ran out, and as he tries to get them back inside, the attacker speaks with him in the doorway.

The attacker was asking about someone who doesn't live at the home, the Sheriff's Office said, then punched the victim twice in the face with brass knuckles.

The attack appears to be random, Sheriff's Office spokesman Danny Alvarez said.

Anyone with information can call the Sheriff's Office at (813) 247-8200.