The incident occurred during a police check at the Unterfoehring subway station on Tuesday, Munich police spokesman Michael Riehlein told The Associated Press.
“Several people were injured by shots. A female police officer was badly wounded,” Munich police tweeted.
A suspect, who was also injured in the incident, was in custody, reports said.
Meanwhile, Munich’s Merkur newspaper quoted witnesses as saying that the suspect had taken a police officer’s pistol and then shot her, and also injured others at the scene.
Police said they had cleared the station.
“According to police information, it is probably not a terrorist attack,” Bavarian radio reported.