Police say a patient wielding a makeshift knife was shot and killed by NYPD officers inside NewYork-Presbyterian Brooklyn Methodist Hospital.

Authorities say they received multiple 911 calls around 5:27 p.m. Friday for a violent man barricaded and armed with a knife. They were informed that the man had cut himself and other people while threatening to kill hospital staff.

Officers responded to the eighth-floor room six minutes later and observed blood spattered all over the walls, floor and on the exterior of the door, police say. Two other people were inside the room: a patient in his 70s and a hospital security guard in his 50s, both of whom he had threatened to kill.

Police say the man came to the door frame holding the bloody weapon.

Officers stood at the door, ordering the man to drop the weapon. Authorities say the man refused and attempted to close the door.

When the man stepped toward officers, still holding the weapon, officers simultaneously and ineffectively deployed a taser and a firearm, according to police.

As officers attempted to kick the door open, the man came toward them a second time, and they ineffectively deployed tasers a second time.

Authorities say officers then deployed their firearms, striking the man. He was pronounced dead a short time later.

Witnesses described the tense scene inside the hospital.

"I heard shots, there was a scuffle prior to the shots and then they made all of us hunker down in the room,” said Cheryl Wallace, who was visiting a patient. "I'm thankful I made it out. And the rest of the other people made it out. But it was definitely scary when people were out."

Police say the man had been admitted to the hospital Wednesday. His identity has not been released.