NEW YORK, April 13 (AP) - Police hunted late into the night for the gunman who opened fire Tuesday on a subway train in Brooklyn, an attack that left 10 people wounded by gunfire and once again interrupted New York City’s long journey to post-pandemic normalcy.

The search focused partly on a man who police say rented a van possibly connected to the violence.

Investigators stressed they weren’t sure whether the man, Frank R. James, was responsible for the shooting. But authorities were examining social media videos in which the 62-year-old decried the United States as a racist place awash in violence and sometimes railed against the city’s mayor, Eric Adams.

“This nation was born in violence, it’s kept alive by violence or the threat thereof and it’s going to die a violent death. There’s nothing going to stop that,” James said in one video.

Police Commissioner Keechant Sewell called the posts “concerning” and officials tightened security for Adams.

The gunman sent off smoke grenades in a crowded subway car and then fired at least 33 shots with a 9 mm handgun, police said. Five gunshot victims were in critical condition but expected to survive. At least a dozen people who escaped gunshot wounds were treated for smoke inhalation and other injuries.