'Hero' police officer among four killed in shooting at New York office building
Four people, including a police officer, have been killed in a mass shooting at the NFL headquarters in New York on Monday evening.
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The suspect, who died from what's thought to be self-inflicted injuries during the attack, has been identified as 27-year-old man Shane Devon Tamura from Las Vegas.
The lone gunman was captured on CCTV footage sauntering across the square in front of the Manhattan building, semi-automatic rifle in hand, moments before he opened fire on workers inside the skyscraper.
Tamura died of a self-inflicted gunshot wound to the chest after he opened fire on the officer stationed in the lobby of the building, before gunning down three employees, officials have said.
The building - home to the NFL's headquarters as well as hedge fund giant Blackstone - was placed on lockdown, with surrounding buildings evacuated as police tried to ascertain whether multiple suspects were at large.
Images emerging from inside the office block show panicked city workers barricading themselves inside their offices, with sofas and desks wedged up against the door in an attempt to keep the gunman at bay.
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Stills captured from a security camera outside the building show the suspect, wearing a sport coat and a buttoned shirt, entering the building with an AR-15-style rifle at around 6.30pm local time (11.30pm UK).
New York police commissioner Jessica Tisch said at a news briefing that Tamura had a "documented mental health history".
However, his motive currently remains unknown.
At least six other people were injured, officials have reported after the lockdown was lifted.
Tamura's body was found on the 33rd floor of the 44-storey building along with the semi-automatic weapon.
The Fire Department of New York said emergency crews were called to the Park Avenue office building around 6.30pm on Monday.
Law enforcement officials located identification on Tamura's body, including a concealed carry permit from Las Vegas.
A note, which is said to have been found on the gunman's body, requested that his brain be studied by scientists, the New York Post reported.
The note, reported to be several pages long, blamed his struggle with chronic traumatic encephalopathy (CTE) for the attack.
CTE is a neurodegenerative disease that is common among American football players, with links drawn between the high impact nature of the sport and the condition.
The officer who was killed has been named as Didarul Islam.
The 36-year-old officer was married with two young boys, and his wife is pregnant with his third child.
Commissioner Tisch said in the news briefing: "He was going the job that we asked him to do.
"He put himself in harms way. He made the ultimate sacrifice.
"Shot in cold blood, wearing a uniform that stood for the promise that he made to this city.
"He died as he lived - a hero."
The New York Fire Department paid tribute to the officer on X, writing: "Police Officer Didarul Islam represented the very best of our department.
"He was protecting New Yorkers from danger when his life was tragically cut short today.
"We join in prayer during this time of incomprehensible pain. We will forever honor his legacy."
An expat in New York said: "I was with a few colleagues at a restaurant just two blocks away from the office when the shooting happened. We were all shocked when we heard the news from colleagues still in the office. Most of midtown Manhattan was swiftly locked down.
"I’m glad I was safe and grateful that none of my colleagues were hurt or injured. My heart still goes out to the people who were killed in this incident.
"You think something like this will never happen to you but it just goes to show you how fleeting life is. Gun crime is a real problem and safety issue and is something my American colleagues said they constantly worry about and are educated on at school from a young age.
"New Yorkers are resilient so we expect to get back to work and get on with it right away."