An NFL employee was seriously injured in a shooting at a   Midtown Manhattan office tower Monday where a gunman killed at least four people before turning his weapon on himself.

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.

New York City Mayor Eric Adams said Tuesday that a gunman who killed four people at a Manhattan office building was trying to target the