An armed man opened fire inside a high -rise corporate building in Manhattan’s heart on Monday night, killing a police officer from New York City and three other people, authorities said.
The alleged shooter acted alone and died of a self -inflicted gunshot wound, said officials in charge of enforcing the law to NBC News.
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The deadly shooting, which was first reported around 6:30 pm, was treated as an active shooting, which caused offices and evacuations of people, with lines of people views that leave the building with their hands on their heads.
The reason for the gunman has not been revealed.
This is what we know so far:
The victims
A police officer from the city of New York, whose identity has not been made public, was killed, said three senior officials responsible for enforcing the law.
The officer’s family has been notified of death.
Four civilians also died. Their names have not been released.
The gunman
Officials in charge of enforcing the law said that violence was carried out by a lonely armed man, who died of a self -inflicted gunshot wound.
The alleged shooter has been identified as Shane Devon Tamura, 27, of Las Vegas, according to four senior officials responsible for enforcing the law.

In a photo, three officials in charge of enforcing the law shared with NBC News, the alleged armed man is seen walking towards the building of the center of Manhattan with dark clothes and sunglasses and carrying what appears to be a great firearm.
A reason has not been determined.
Caleb Clarke, a former classmate and high school soccer teammate, said Tamura “was the most fool in the world, just a lot of energy, class clown.” The two played together in California until Tamura was transferred from Santa Clarita to Granada Hills in 2015, just before his last year.
Clarke said that in recent years, he and Tamura remained only through social networks, where Tamura shared that he had been working in a casino in Las Vegas. But he does not remember that Tamura has been a ruffle in school. “You would never have thought that violence was something you would associate with him. You know, he could make a joke about people, but that’s typical. Shane was a Jokester. Everything he said was a joke. He had a lot of energy.”
He added that it seemed that Tamura was destined for greatness as a athlete. “I feel that I was definitely on the table for him,” said Clarke. “I don’t think I walked to say, ‘Oh, I will have NFL games someday.’ I think it was more of all telling him how good it was … how special it was.”
The building
The 345 Park Ave. by Midtown Manhattan is the headquarters of the Blackstone investment firm.
The building also houses the headquarters of the NFL and a Bank of America branch, as well as offices belonging to KPMG.
Blackstone, Bank of America and the owner of the building, Rudin Management, did not immediately respond to comments requests.
In a statement, KPMG said his thoughts were with the victims and their families.
“Our hearts are with the victims of this horrible act and their families,” he said. “We are incredibly grateful for the courage to build security and application of the law.”