NFL employees were told to shelter in place Monday evening as a gunman opened fire inside the New York City building that houses the league's headquarters, killing four and leaving another in critical condition.

Police have identified the man who entered a Midtown Manhattan office building wearing body armor and opened fire killing four people with a high-powered rifle, as Shane Devon Tamura.

On Monday evening, David Muir shared breaking news about a tragic shooting in New York City in which a gunman killed four people and wounded a fifth before taking his own life

Police have arrested a 36-year-old woman in connection with the deaths of newborn twins found behind a New York City apartment building nearly five years ago

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