Four people were wounded at a Brooklyn subway station Sunday when police officers shot a man threatening them with a knife, and inadvertently sprayed bullets that hit passengers, authorities said.

The people struck by gunfire included two innocent bystanders, one of the officers and the man with the blade, who the police initially confronted because he hadn’t paid his fare, officials said.

One of the passengers, a 49-year-old man, was hospitalized in critical condition after a bullet passed into an adjoining subway car and struck his head.