MUNICH, Germany (AFP) - A German man shot a 26-year old policewoman in the head on Tuesday (June 13) using a gun he had grabbed from another officer at a Munich train station, police said, adding there was no indication of a link to terrorism.

The 37-year-old man, who had been involved in a brawl at Unterfoehring station, shoved a policeman on the platform and grabbed his gun as a train was entering the station.

"Then there was an exchange of fire during which a 26-year old policewoman .. suffered a potentially life-threatening injury in the head," Munich police said in a statement.

The man was also injured in the incident and then arrested. Two other people were also hurt but their lives are not in danger, said police. The area around the station was sealed off.

"There are no indications of a terrorist background," the police said, adding that an investigation was being carried out

Last July, an 18-year-old, David Ali Sonboly, shot dead nine people at a Munich shopping mall before turning the gun on himself, having spent a year planning the rampage.

Police said the German-Iranian teen was "obsessed" with mass murderers such Norwegian right-wing fanatic Anders Behring Breivik and had no links to the Islamic State in Iraq and Syria (ISIS) group.

And in March, an axe-wielding attacker wounded nine people in a bloody rampage at a railway station in the western city of Duesseldorf.

The 36-year-old Kosovan national had been diagnosed as a paranoid schizophrenic with a history of high anxiety and self-harm, police said, ruling out a terrorist motive.

Instead, they suggested he might have carried out the attack at the station to end his own life.

The suspect was taken into custody after jumping off a bridge.

German authorities have been on high alert since a series of attacks claimed by ISIS.

The most deadly came last December when a Tunisian rejected asylum seeker rammed a truck into a crowded Berlin Christmas market in an attack that killed 12 people and wounded dozens of others.