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

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

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

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.

NYC Mayor Eric Adams said the gunman appeared to be targeting the NFL over CTE, a degenerative brain disease.

Here's how NFL players, coaches and executives reacted to a mass shooting at the league's office building in Manhattan: ...

Follow along for live updates with the New York City shooting, where police investigate motive after five people, including ...

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

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

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

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