PHILADELPHIA (CBS) — Philadelphia Police are questioning a security guard following a fatal shooting at a bar in the Olney section of Philadelphia.

The incident took place late Saturday night at a bar on the 5200 block of N. 5th street.

Police say a customer got into a fight with a security guard at the establishment. According to police, the guard shot the patron after the patron took a swing at him.

Detectives are questioning the security guard and reviewing surveillance video.