NYPD cop Didarul Islam, the first victim of Monday’s deadly mass shooting in Midtown Manhattan, was remembered as a true Big Apple hero.

Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

An NYPD officer, a Blackstone executive, a Rudin Management associate and a security guard were killed in the shooting at Manhattan's 345 Park Avenue.

Multiple casualties as gunman opened fire in the lobby of the midtown Manhattan building on Park Avenue that is home to the Blackstone investment firm and other corporations before moving to other floors.

The four victims who were killed by a gunman inside a Midtown Manhattan office building ​on Monday night have been identified.

The 27-year-old man who shot and killed four people at a Midtown office building on Monday carried a note in his pocket, police sources told ABC News.

Shane Tamura, a 27-year-old man from Las Vegas, has been identified by the NYPD as the shooter who killed four people inside a Manhattan skyscraper on Monday. Tamura left his home on Saturday for a three-day cross-country journey,

Shane Tamura, the shooter behind the deadly rampage in Midtown Manhattan,​ was apparently targeting NFL offices, NYC Mayor Eric Adams says.