• The Midtown Manhattan building houses the NFL headquarters and offices of major financial firms.
• Police said the motive for the shooting remains under investigation.

NEW YORK CITY – Police were trying to determine why a gunman armed with an M4 rifle charged into a Park Avenue skyscraper during rush hour and fatally shot at least four people, including a New York city police officer, before killing himself.

Five people were shot, including and four civilians, in the rampage July 28 inside the 44-floor, Midtown Manhattan building that houses the NFL headquarters and offices of major financial firms, New York City Police Commissioner Jessica Tisch said. Four other people were also treated for minor injuries they sustained while attempting to flee the scene, Tisch said.

The officer who was killed was identified as Didarul Islam, 36. Mayor Eric Adams ordered all flags on all city buildings and stationary flagstaffs throughout the five boroughs to be lowered to half-staff until further notice in homage to Islam.

“Officer Didarul Islam died as he lived, a hero and protector of New York City,” Adams said in a social media post July 29. “We will never forget you.”

How the shooting happened

Police received multiple reports of an active shooter inside the building, Tisch said at a news conference July 28, hours after the deadly rampage. The suspect opened fire at an NYPD officer who was working a paid detail at the building, according to Tisch. He then shot a woman who “took cover behind a pillar and proceeds through the lobby, spraying it with gunfire,” the police commissioner said.

The suspect also shot a security guard who was behind a security desk and another man in the lobby, Tisch added. The gunman then entered the building’s elevator and went up to the 33rd floor, where the building’s owner, Rudin Management, is located.

“(The suspect) begins to walk the floor, firing rounds as he traveled,” Tisch said. “One person was struck and killed on that floor. He then proceeds down a hallway and shoots himself in the chest.”

Gunman kills four in rush-hour attack at Manhattan skyscraper

The suspect: Shane Taura, 27, of Nevada

The alleged gunman was identified as 27-year-old Shane Tamura, of Nevada. Police said the motive for the shooting remains under investigation and investigators are working to understand why the suspect targeted the commercial building.

“We believe this to be a lone shooter and there is no longer an active threat to the public,” Tisch said, who said Tamura had a “documented mental health history.”

Christopher Raia, FBI assistant director in charge of the New York Field Office, said the bureau is standing by to help NYPD if needed in the investigation.

NFL employee was seriously injured in New York City shooting

NFL employee among injured

An NFL employee was seriously injured during the mass shooting and was in stable condition at a New York hospital on Monday night, NFL Commissioner Roger Goodell told staff in a memo.

“We believe that all of our employees are otherwise safe and accounted for, and the building has nearly been cleared,” Goodell wrote in the memo, obtained by USA TODAY Sports. Goodell called it “an unspeakable act of violence.”

Goodell advised staff based in New York to work remotely July 29, adding that it is understandable if they preferred to take the day off. He emphasized that there are significant resources available for employees, including grief counselors.

He also maintained that there will be increased security presence at the building in the days and weeks to come.

− Jarrett Bell

Where is 345 Park Ave? What to know about site of Midtown Manhattan shooting

The building: 345 Park Avenue

The skyscraper at 345 Park Ave. is home to several high-profile tenants in addition to the NFL, among them KPMG, Blackstone Group and Bank of America’s financial center. Commercial giant Rudin Management owns the high rise structure, which was designed by Fox & Fowle Architects.

“Our hearts go out to the victims of this horrific act and their families. We are incredibly grateful for the bravery of building security and law enforcement,” KPMG said in a statement to USA TODAY.

− Anthony Robledo

Family members wait for loved ones

Hours after the shooting, several Manhattan blocks were still closed by police. The area is heavily marked by business offices and hotels. It’s steps away from several major tourist destinations, including St. Patrick’s Cathedral and Trump Tower.

Behind NYPD barricades, Armand Bramellari, 36, waited hours for his mom, a cleaner in the building, to be let out.

She was on the second floor when the shooting happened, he said. After seeing news of the shooting on X, he rushed over to pick her up, parking on a side street, he told USA TODAY.

Bramellari wondered how the shooter accessed the building, which normally requires a badge or access by security. “This . . . doesn’t happen,” he said, holding a pack of Marlboro Reds.

His family, originally from Albania, arrived thanks to his mom getting a lottery slot to enter the United States, he said. “She brought us here, and she’s got to die at work?”

Moments later, his mom finally appeared with a group of women. He passed an NYPD barricade and embraced her and the others before they went down a side street to his car.

Suspect has a ‘documented mental health history’

A vehicle that was double parked outside of the Park Avenue building was registered under Tamura’s name in the state of Nevada, according to Tisch.

Inside the vehicle, Tisch said officers discovered a rifle case with rounds, a loaded revolver, ammunition, magazines, a backpack and medication prescribed to Tamura. The police commissioner added that the vehicle was also searched by the NYPD bomb squad and was found to be clear of any explosives.

A preliminary investigation revealed the suspect’s vehicle had traveled across the country through Colorado on July 26, and Nebraska and Iowa on July 27, according to Tisch. The vehicle was also tracked in Columbia, New Jersey at 4:24 p.m. on July 28 before entering New York City.

“According to our law enforcement partners in Las Vegas, Mr. Tamura has a documented mental health history,” Tisch said.