A New York police detective has been suspended after a surveillance video appeared to show him taking money from a Brooklyn deli during a sweep of the store for loose cigarettes.

The detective, Ian Cyrus, 49, who was assigned to the Brooklyn North narcotics unit, was suspended “based on the nature of the allegations in this incident, in addition to the video provided to us,” Stephen Davis, the top spokesman for the Police Department, said in a statement on Thursday.

Detective Cyrus’s supervisor in the narcotics unit, Sgt. Fritz Glemaud, 44, has been placed on modified duty, Mr. Davis added.

The police said the Internal Affairs Bureau and the Brooklyn district attorney’s office were conducting a joint investigation of the episode.