A youth described as an Afghan refugee attacked passengers with an ax late Monday aboard a German commuter train, injuring at least four people before being shot and killed by police, authorities said.
Three of the victims sustained serious injuries before the assailant fled from the train and was confronted by police officers in the southern German province of Bavaria. The youth shouted "Allahu Akhbar"--Arabic for 'God is great" - before he was shot, two German security officials said.
Bavarian Interior Ministry officials described the attacker as a 17-year-old Afghan national who had arrived in Germany as an unaccompanied refugee. The officials said it was not yet clear whether the incident was an act of terrorism.
The assault occurred amid heightened fears in Germany about possible terrorist attacks, coming four days after 84 people were killed in an apparent jihadist-inspired attack in Nice, in the French Riviera.
Bavarian officials and local news accounts said the incident occurred after 9 p.m. local time on Monday on a commuter line that runs from Treuchtlingen to Wuerzburg in Bavaria province. The youth hacked and slashed at some of the train's 20 passengers, injuring at least four of them.