The USA Police and federal agents are searching for the man who set off smoke bombs and sprayed fellow passengers with gunfire aboard a New York City subway car, injuring more than 20 people before he fled from the scene.

The attack erupted during the Tuesday morning commuter rush as the Manhattan-bound N Line train was pulling into an underground station in Brooklyn’s Sunset Park neighborhood.

Police said, 10 people were struck directly by gunfire, five of them hospitalized in critical but stable condition, while 13 others suffered respiratory distress or were otherwise injured in the crush of frantic riders fleeing the smoke-filled subway car.

Some injured passengers collapsed as they poured onto the platform of the 36th Street Station.

Police authorities have also offered rewards totaling 50,000 dollars for information leading to the arrest of a suspect they believed acted alone.