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

New York City Police Department officer Didarul Islam was shot and killed at a Manhattan office building where a gunman ...

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

Five people, including a New York City police officer, died in a shooting in Manhattan. Suspected gunman Shane Devon Tamura ...

An off-duty New York City police officer and an executive at an investment firm were among four people killed by a gunman at ...

Shane Tamura, the suspect in the deadly shooting in Midtown Manhattan, carried a note in his pocket claiming he suffered from CTE and also made references to the NFL, police sources told ABC News.

The New York Giants are among those around the NFL community reacting to Monday night's mass shooting in Manhattan.

The attacker reportedly drove cross-country from Las Vegas to New York in the days leading up to the shooting.

New York City is mourning NYPD Officer Didarul Islam and three other people killed in Monday's shooting inside an office ...

A man exited a double parked BMW with an M4 rifle and then walked toward the skyscraper that is home to the headquarters of ...

An NFL employe was seriously injured on Monday in a shooting at a New York City office tower that killed four people, ...