Four people, including a police officer, were shot dead by a lone rifle-carrying shooter in Manhattan on Monday evening, local media reported.
The suspect, 27-year-old Shane Devon Tamura from Las Vegas, walked into the headquarters of the Blackstone investment firm at around 6:30 p.m.. He was reportedly wearing a bullet-resistant vest and carrying an AR-style rifle.
Tamura killed two security guards, one of them a city policeman on security detail, as well as a real estate executive and a business management associate, before taking his own life on the 33rd floor of the Park Avenue skyscraper.
The NYPD reported that Tamura had a documented history of mental illness.
"At this time, the scene has been contained and the lone shooter has been neutralized," NYPD Commissioner Jessica Tisch said in a statement on X/Twitter.
Images circulated by various media outlets show the suspect strolling across Park Avenue with an M4 assault rifle.
NYC Mayor Eric Adams tells residents to avoid the area
The skyscraper at 345 Park Avenue houses a number of financial firms, including Blackstone, the world's largest hedge fund, as well as KPMG and Deutsche Bank, along with the NFL headquarters and the Consulate General of Ireland.
Adams warned people between Park Avenue and East 51st Street not to go outside while the shooter was still active.
New York Governor Kathy Hochul added that she was briefed on the situation in a statement on X/Twitter.
"I’ve been briefed on an active shooter situation in midtown Manhattan."
The UN hosted a conference on a two-state solution for the Israeli-Palestinian conflict in New York City on Monday. At this time, it is unclear if the shooting was connected to the conference, though social media accounts circulated images of a man in a Palestine shirt detained near the scene of the crime.
New York officer killed in shooting was Bangladeshi immigrant whose wife was pregnant
The New York police officer killed in a mass shooting in a Manhattan skyscraper on Monday was described by the city's mayor and police commissioner as a heroic Bangladeshi immigrant who saved lives while "putting his life on the line."
"We lost four souls to another senseless act of gun violence, including a member of the New York City Police Department, Officer Islam," New York Mayor Eric Adams told reporters in a press conference late on Monday.
Adams said the officer was a three and a half year veteran of the police department.
"He was saving lives, he was protecting New Yorkers," Adams said. "He loved this city, and everyone we spoke with stated he was a person of faith and a person who believed in God."
Adams said he met the officer's family on Monday night.
"I told them that he was a hero, and we admire him for putting his life on the line," the mayor added.
Islam was married, had two young sons, and his wife is pregnant with a third child, Police Commissioner Jessica Tisch said in the press conference.
"He put himself in harm's way. He made the ultimate sacrifice — shot in cold blood," she said.
Islam was working on a paid security detail in the building when the shooting occurred, the commissioner added.
Such details allow "companies to hire officers in uniform to provide extra uniform security," she said.
Excluding Islam, 42 federal, state, county, municipal, military, and US territories officers have died in the line of duty in the first half of 2025, according to preliminary data from the National Law Enforcement Officers Memorial Fund.