The New York Police Department has opened an internal investigation after video footage surfaced showing two officers repeatedly punching a man during an arrest at a Brooklyn liquor store.

The incident occurred during an undercover drug operation, according to reports. Video of the altercation shows the officers punching and kicking the man during the arrest.

Authorities initially believed the man was a suspect in a drug deal, but later determined he was not involved in the alleged criminal activity the officers were investigating.

The footage has been described by officials as disturbing. The two officers involved in the incident are currently under investigation by the department's internal affairs division.

The NYPD has not released additional details about the circumstances surrounding the arrest or the current status of the officers involved in the incident.