Chief James Essig told reporters that a cache of weapons was recovered at the scene, including guns, ammunition, a hatchet, gasoline, and a pair of keys to a U-Haul van

Investigators found the vehicle parked in Brooklyn and have since linked it to a man named Frank R. James, who appears to have rented it in Philadelphia.

Essig offered several new details about the shooting, which occurred just before 8:30 a.m. "As that N train was between stations at 59th Street and 36th Street

seated in the second car, in the rear corner was a dark skin male," Essig said during an evening press conference.

"As the train pulled into the station, witness say the man opened up two smoke grenades, brandishes a Glock 9mm handgun he then fired that weapon at least 33 times."

construction-style nylon vest. He also had on a grey hoodie, a surgical mask and a neon green construction helmet Earlier in the day, officials said the gunman had