Surveillance video from inside a Brooklyn deli shows a 78-year-old man being beaten up and robbed by two thugs last week, authorities said.

The elderly victim was inside Shorty’s Deli on Marcus Garvey Boulevard when one of the men attacked him around noon Wednesday.

The suspect punched the victim several times in the face and body before his buddy, who is not shown in the video, stole the man’s cell phone and wallet.

Both suspects then fled the scene, leaving the victim with cuts and bruises to his face, cops said.

Both suspects are believed to be in their 20s or 30s, stand around 5-foot-8 and have beards.