MUNICH cops have arrested a "volatile" suspect accused of stabbing at least FIVE people in a frenzied attack near an underground station in the German city.

The area around Rosenheimer Platz has been placed on lockdown after several people were attacked in the street.

6 A special German police officer is pictured at the site where earlier a man injured several people in a knife attack in Munich Credit: Reuters

Officers warned residents to stay in their homes when the suspect was still on the run after fleeing on a bicycle.

But Bild reported that at around 11am that police said a man had been arrested.

Pictures on Twitter showed a number of ambulances parked outside the station.

Officers have issued a description of the alleged offender, describing him as around 40-years-old.

6 A German police officer guards the site where earlier a man injured several people in a knife attack in Munich Credit: Reuters

6 German police stands inside a security perimeter set after a man attacked passersby near Rosenheimer Platz in the southern German city of Munich Credit: AFP or licensors

Helicopter circles over Munich after knifeman leaves 'several injured' at underground station

6 The perpetrator, described by the police as a man in his forties, wearing grey pants and a running jacket, fled the scene on a black bicycle Credit: AFP or licensors

6 Police at the scene in Munich where five were stabbed this morning Credit: Reuters

Munich cops hunt ‘volatile’ knifeman after stabbing at underground station leaves ‘several injured’

6 The man attacked passersby in five places near Rosenheimer Platz in the eastern part of the city centre Credit: AFP or licensors

They said: "He is wearing a green training jacket and is riding a black bike.

"He also had a backpack with camping mat."

The injuries of the people stabbed are not said to be life-threatening at this stage.

"We are searching for the perpetrator of the attack with all available police" Munich police said on their Twitter account.

The motive for the attack is unclear but terrorism has not been ruled out.

The Rosenheimer Platz station, which opened in 1972, is on the trunk line of the Munich S-Bahn.

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