The New York police officer killed in a mass shooting in a Manhattan skyscraper on Monday was an immigrant who left behind a pregnant wife, two young sons and distraught parents, and friends and officials in Bangladesh and the United States who described him as a hero.

Four people were killed, including an off-duty New York City police officer, when a gunman opened fire in an office tower before fatally shooting himself, officials said.

Four people were killed, including a police officer, and one was seriously injured when a gunman opened fire inside an office building before killing himself.

New York City Mayor Eric Adams said the gunman in the deadly shooting at a Manhattan office building was targeting the NFL’s league offices. NBC News’ Steven Romo reports on NFL Commissioner Roger Goodell’s message to league employees after the shooting.

The 27-year-old Nevada man opened fire at a New York City office building, killing at least four people and then himself.

A note found in the gunman's wallet was critical of the NFL and mentioned CTE. The 27-year-old wrote, “Study my brain please. I’m sorry."

A shooting in a Manhattan skyscraper late on Monday that killed four people, including a New York City police officer, has been marked by statements of sorrow and prayers for the victims' families, but no sign of the Republican-controlled U.

Rep. Nicole Malliotakis spoke with Fox News Digital after the deadly shooting that left multiple people including a police officer dead.