An NFL employee is among the wounded in Monday’s deadly shooting inside a Midtown skyscraper that housed the league’s offices. 

NFL commissioner Roger Goodell told league staffers in a letter, viewed by The Post, Monday night, that one of their own had been “seriously injured” in the shooting at 345 Park Avenue that took the lives of an off-duty NYPD officer and three others. 

“He is currently in the hospital and in stable condition. NFL staff are at the hospital and we are supporting his family,” Goodell wrote in the message, while assuring league staff that “all of our employees are otherwise safe and accounted for.” 

Mayhem erupted in Midtown when a rifle-wielding gunman, who police identified as Shane Tamura, walked into the 44-story office building that houses the NFL’s offices, along with Blackstone and other businesses and killed four people before he took his own life. 

Follow The Post’s live blog for the latest coverage of the 345 Park Ave. shooting

Officials have not identified three of the victims, but released the name of the fallen NYPD officer during a late-night news conference as 36-year-old Didarul Islam. 

In his letter to NFL employees, Goodell praised law enforcement’s quick response and the heroism of Officer Islam. 

“We are deeply grateful to the law enforcement officers who responded to this threat quickly and decisively and to Officer Islam, who gave his life to protect others,” he wrote. 

The NFL offices occupy floors five through eight inside the Midtown building. 

NFL employees had been told to shelter in place when the chaos began, ESPN reported. 

City officials detailed the harrowing events that unfolded Monday evening at 345 Park Avenue during a press conference. 

Tamura, a 27-year-old Las Vegas resident, walked into the building at 6:30 p.m. armed with a rifle and began shooting in the lobby. 

He made his way to the 33rd floor, where he eventually took his own life. 

How the shooting unfolded

• Reports of the shooting at 345 Park Ave. start coming in around 6:28 p.m.
• Shane Tamura, 27, is seen getting out of a black BMW between 51st and 52nd streets with an M4 rifle.
• He enters the lobby and turns right, where he shoots police officer Didarul Islam, 36, dead.
• Tamura guns down a woman cowering behind a pillar in the lobby, sprays more bullets and walks toward the elevator bank — where he shoots dead a security guard crouching at his desk.
• One more man reports being shot and injured in the lobby. He was in critical but stable condition.
• The gunman allows a woman to walk out of the elevators unharmed before heading up to the 33rd floor, where building owner Rudin Properties’ offices are located, “and begins to walk the floor, firing as he traveled.”
• One woman is shot and killed on that floor before Tamura shoots himself in the chest.
• It’s unclear how long the mayhem lasted. Police Commissioner Jessica Tisch posted on X at 7:52 p.m.: “The scene has been contained and the lone shooter has been neutralized.”

New York City Mayor Eric Adams and NYPD Commissioner Jessica Tisch were both visibly shaken during the press conference. 

Adams had told reporters that one man had been seriously injured and was in critical condition and four others had suffered minor injuries as they fled. 

No motive for the shooting is known, but it was noted that he had a “documented mental health history.”

“His motives are still under investigation. We are working to understand why he targeted this particular location,” Tisch said.