4 killed in shooting at NYC tower housing NFL HQ

Four people, including an off-duty New York City police officer, were killed and another person critically wounded in a shooting Monday at a midtown Manhattan building that houses the National Football League offices and some of the country's top financial firms, authorities said.

Police identified the gunman as Shane Tamura, of Las Vegas, and said he killed himself. He had a 'documented mental health history,' but the motive is still unknown, police Commissioner Jessica Tisch said at a news conference.

"We are working to understand why he targeted this particular location," Tisch said.

Another man was seriously injured and remains in critical condition, Mayor Eric Adams said.

Adams said officials are still "unraveling" what took place. "Five innocent people were shot" along with the perpetrator, he said.

The officer who was killed was a 36-year-old, who was an immigrant from Bangladesh and had served as a police officer in New York City for 3 1/2 years.

"He died as he lived. A hero," Tisch said.

Surveillance video showed a man exiting a double parked BMW and carrying an M4 rifle before he walks toward the building. He immediately opened fire on the NYPD officer as he entered the building and shot a woman who tried to take cover and then began "spraying" the lobby with gunfire, Tisch said.

The man then made his way to the elevator bank and shot a security guard who was taking cover behind a security desk and shot another man in the lobby, the commissioner said.

Officers found a rifle case, a revolver, magazines and ammunition in his car, Tisch said.

The Fire Department of New York said emergency crews were called to the Park Avenue office building around 6:30 p.m. for a report of someone shot.

NFL employees had been told to shelter in place at the time, ESPN's Jeff Darlington reported. The NFL is located on floors five through eight.

ABC News reported the officer was taken to Weill Cornell Medical Center in Manhattan where he was pronounced dead. At least one of the civilians was brought to Bellevue Hospital.

Jessica Chen told ABC News she was watching a presentation with dozens of other people on the second floor when she "heard multiple shots go off in quick succession from the first floor."

She and others ran into a conference room and barricaded tables against the door.

"We were honestly really, really scared," she said, adding that she texted her parents to tell them that she loves them.

Local TV footage showed lines of people evacuating the office building with their hands above their heads. The building includes offices of Blackstone and the consulate general of Ireland.

Some finance workers at an office building down the block were picking up dinner at a corner eatery when they heard a loud noise and saw people running.

"It was like a crowd panic," said Anna Smith, who joined the workers pouring back into the finance office building. They remained there for about two hours before being told they could leave.

The building where the shooting happened is in a busy area of midtown, located a short walk north from Grand Central Terminal and about a block east of St. Patrick's Cathedral.

The city's emergency management alert system warned of traffic delays, road closures and disruptions to public transportation in the area.

Information from The Associated Press was used in this report