Four muggers beat a 36-year-old man with a metal pipe and stabbed him during a Brooklyn robbery late Sunday, cops said.

The victim was crossing Kings Highway near Ocean Avenue in Sheepshead Bay around 9:30 p.m. when the crew approached and struck him with the pipe in the apparently unprovoked attack, authorities said. 

They then stabbed him in the stomach with a knife, cops said. 

The suspects grabbed the victim’s wallet before bolting, police said.

The victim was taken to a local hospital in stable condition.