WÜRZBURG, Germany (CBSNewYork/CBS News/AP) — A teen armed with an axe and a knife attacked passengers aboard a regional train in southern Germany on Monday night, injuring four people.

The assailant was shot and killed by police as he fled, CBS News reported.

The 17-year-old Afghan refugee with unclear asylum status attacked people on the train shouting Allahu Akbar, CBS News has learned.

Würzburg police said on their Facebook page that three of the victims suffered serious injuries and one was slightly injured.

More From CBS News

Another 14 people were being treated for shock.

Police said there was not yet any information on the motive behind the attack. Details on the identity of the attacker also were not immediately available.

The train was on its way from the Bavarian town of Treuchtlingen to Würzburg, which is about 60 miles northwest of Nuremberg.

(TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)