BERLIN (AP) — Passengers boarding a plane at the German capital's Tegel airport got a scare when a police officer accidentally fired a shot from his service pistol.

Police told the dpa news agency the Berlin police detective was boarding the plane to Cologne on Monday morning when the shot went off in the walkway just before he got on the aircraft.

The officer was on duty accompanying another passenger but police would give no further details.

Nobody was hurt and the plane was able to get underway after a delay.

Federal police are investigating the incident.