Bystander shot in head as New York police tackle fare-evader

But critics have questioned how the pursuit of a minor offender escalated into the use of lethal force in a crowded space.

Tom Donlon, the city’s interim police commissioner, ordered a full investigation but added: “Make no mistake, the events that occurred… were the results of an armed perpetrator”.

None of those involved have been named by police.

Jennvine Wong, of the Legal Aid Society Cop Accountability Project, told The New York Times that police had endangered lives after choosing “in an enclosed space … to use disproportionate force”.

In a press conference, NYPD Chief of Department Jeffrey Maddrey said that two officers had seen a man go through barriers without paying.

Mr Maddrey said body camera footage showed the suspect threatening to “kill” the officers if they followed him, before confronting them with a knife.

The footage shows a train pull into the station as the confrontation escalated. The officers fired Tasers at the man – to no effect – as he attempted to board the train, before he jumped back to the platform.

“At one point he is advancing on one of the officers with his knife,” Mr Maddrey said. “The officer stands back, he draws his weapon, and both officers at this point fire.”

Two bystanders, a police officer and the suspect were hit.

Mr Maddrey said that the officer realised he had been shot in the armpit but continued to perform “life-saving measures” on the suspect. Both officers then realised that two bystanders had also been hit by gunfire. Two other officers then arrived and aided the wounded.

Officials said that the suspect had a record of 20 previous arrests and a significant history of mental illness.

Janno Liever, the chief executive of the Metropolitan Transportation Authority, said that the incident “started because somebody wanted to come to the transit system with a weapon, somebody who… had a history of crime and a history of violence and even gun charges”.