The New York Police Department is conducting an internal investigation after a video surfaced of another officer using an apparent chokehold on a suspect during an arrest.

Police say the July 14 incident happened at a subway station in East Harlem.

They say 22-year-old Ronald Johns was arrested on a fare-evading charge after walking through an emergency gate without paying.

It happened three days before another man, Eric Garner, died in police custody after an officer apparently placed him in a chokehold. That officer has been placed on modified assignment. Garner’s funeral was held Wednesday.

Police say Johns also was charged with resisting arrest and criminal trespass.

The cellphone video shows a police officer with an arm around the suspect’s neck as he struggles to arrest him. Chokeholds are banned under NYPD policy.

(AP)