WISCONSIN (CBS 58) -- In a news conference Tuesday evening, officials revealed that a person of interest in a Brooklyn subway attack that left several injured Tuesday morning, April 12, has connections to Wisconsin.

This is Frank James. He is a person of interest in the shooting that took place on the N train in Brooklyn Tuesday morning. Anyone with information on his whereabouts is asked to call @NYPDTips at 1-800-577-TIPS. pic.twitter.com/vSYb5UIu2k

— NYPD NEWS (@NYPDnews) April 12, 2022

Authorities say the person of interest, 62-year-old Frank R. James, has addresses in both Wisconsin and Philadelphia.

As a Manhattan-bound N train approached the 36th St. station Tuesday morning, witnesses said a man opened up two smoke grenades, tossed them on the subway floor and then fired a handgun at least 33 times before fleeing the scene.

Police say 10 people were shot, including seven males and three females. Thirteen additional people suffered injuries from smoke inhalation, falling down or panic attacks.

At the scene, officials located a handgun, three extended magazines, 33 shell casings, 15 bullets, five bullet fragments, two detonated smoke grenades, two non-detonated smoke grenades, a hatchet, a black garbage can, a rolling cart, gasoline, and a U-Haul key.

Police say the U-Haul key found at the scene led to the recovery of a van in Brooklyn. James is believed to have rented the U-Haul van in Philadelphia. According to CNN, records show James rented the van using a Wisconsin license with a Milwaukee address.

Detectives are actively trying to determine the shooter's whereabouts and determine what James' involvement, if any, is.

Anyone with information on the whereabouts of Frank James is asked to contact NYPD at 1-800-577-TIPS.

This is a developing story. Stick with CBS 58 for updates on-air and online.