LI PDs On High Alert After 23 Shot Or Injured In NYC Subway Shooting

LONG ISLAND, NY — Long Island's two largest police agencies do not believe there are any credible threats to the region after at least 10 people were shot and explosives were found at a subway station in Brooklyn on Tuesday morning, but they remain on high alert.

Nassau Police Commissioner Patrick Ryder said the department is increasing patrols "around all critical infrastructure with an emphasis on mass transit" and he has been "in conversations" with the New York Police Department's brass and has briefed Nassau County Executive Bruce Blakeman.

Ryder said he is asking residents to report anything suspicious to 911 immediately.

"We continue to work with our federal, state, and local partners as we monitor this investigation," he said. "If you see something, say something, if you hear something, say something."

Suffolk police are monitoring intelligence and are conducting "high visibility patrols."

"While there is currently no credible threat in Suffolk County, the Suffolk County Police Department is communicating with our partners in law enforcement regarding the situation," a spokeswoman said.

A man wearing a gas mask and an orange vest was seen running from the scene of the Sunset Park shooting, according to the NYPD.

Police later identified Frank R. James, 62, as a person of interest in the case, saying that he rented a U-Haul truck they believe is connected to the mass shooting at the Sunset Park subway station.

Authorities said keys from a U-Haul rented in Philadelphia were found in the N subway car along with a handgun, bullets, smoke grenades, explosives and a hatchet.

More From Our Team Covering This Story In New York City:

• 17 Hurt In Brooklyn Subway After Man In Gas Mask Opens Fire
  
• U-Haul Linked To Brooklyn Subway Shooting Found: Reports
• Brooklyn Subway Shooting: Frank James Named As Person Of Interest

The shooting scene was a chaotic one on Tuesday morning as firefighters and paramedics from the Fire Department of New York rushed to 36th Street Sunset Park station to investigate smoke at about 8:30 a.m. There they found at least 10 people wounded by bullets, as well as 13 others injured, and several "undetonated devices," officials said.

Twitter images show blood smeared on the platform, a man lying on the platform and screaming commuters fleeing a train while smoke spews from the open doors. A limping man can also be seen pulling himself out of the train and then falling to the ground, video shows.

Kayla Levy, Matt Troutman, Gus Saltonstall, and Kathleen Culliton contributed additional reporting to this story.