At least 2 hurt, including cop in serious condition as active shooter reported at Park Ave skyscraper housing Blackstone, NFL headquarters

A crazed gunman wearing a bulletproof vest opened fire inside a swanky Midtown skyscraper that houses the Blackstone and NFL Monday, leaving one cop in serious condition — before turning the gun on himself, sources said.

The man entered the building armed with a rifle, law enforcement sources told The Post.

He barricaded himself inside and was found dead from a gun inflicted gunshot wound on the 33rd floor, sources said.

At least one police officer was shot at the scene and is in critical condition. Another civilian was shot and is also in critical condition, police said.

An emergency medical unit is en route to the 44th floor of the building.

This is a breaking story. Please check back for updates.