Five people were shot by a gunman wielding a high-power M4 rifle in a Midtown Manhattan building, with four victims succumbing to their injuries. One of the four victims was an off-duty New York Police officer assigned to a Bronx precinct, NYC Mayor Eric Adams said Monday evening.

An employee for the NFL was seriously injured during a shooting at a New York City office building Monday night.

Four people were killed, including a police officer, and one was seriously injured when a gunman opened fire inside an office building before fatally shooting himself.

The ordeal in the Blackstone Building in Midtown Manhattan in New York City has led to a complete lockdown - as authorities have warned people to remain vigilant

A BBC journalist at the scene saw scores of police vehicles and at least one person with a bloodied chest being taken away.

The shooter is reportedly armed with an assault rifle, likely an AR-15, and hundreds of people are sheltering in place. The assailant reportedly has a bulletproof vest. The video shows massive police presence. People can be seen fleeing from the scene, while cops appeared to be moving towards the building.