A Hasidic man was stabbed in Brooklyn on Wednesday — and cops are investigating the attack as a possible hate crime.

Yehuda Brickman, 25, felt a sharp pain in his right shoulder as he walked east on Empire Boulevard in Crown Heights at around 11:45 a.m.

When the man realized he’d been stabbed, he turned around and saw his attacker running in the opposite direction, cops said.

Brickman,, who suffered a collapsed lung, was in stable condition at Kings County Hospital.

“We’re very concerned about that [case],” Mayor de Blasio said at a press conference. “We’re looking at that as a potential hate crime.”

The men had never met before and hadn’t exchanged words before the attack, police said.

“Right now, we’re looking at it as a possible hate crime because he’s dressed in that fashion,” Chief of Detectives Robert Boyce said, referring to the Hasidic clothing Brickman was wearing at the time.

Surveillance video shows the suspect, a black man wearing a black jacket and blue sweat shirt, running southbound on Albany Avenue.