He ran from cops and got caught with his pants off.

Police called to investigate a possible assault in a NYCHA housing complex in Brooklyn on Wednesday morning found a man trying to flee in just his skivvies and tank top, The Post has learned.

Cops were called to the Fiorentino Plaza projects in East New York when a family member claimed a dispute between a man and a woman in their 20s had gotten ugly.

When authorities arrived at the Pitkin Avenue complex, the man bolted, a Post photographer saw. He was caught by police a block away at Atlantic and Miller avenues pantsless, sporting just a white tank top and underwear.

He was taken to Brookdale hospital for cuts to his leg and bruises on his head.