Bavarian Interior Minister Joachim Herrmann said the attacker was a 17-year old Afghan refugee who came to Germany as an unaccompanied minor and had been living in Ochsenfurt, a town nearby.
There are reports that the attacker shouted, "Allahu Akbar!" beforehand, but officials have not yet disclosed a motive for the attack.
to brandish (verb) - to swing around in an excited and threatening manner
to run - to go on a schedule (as in a public vehicle)
an unaccompanied minor - a young person travelling without parents or a guardian
motive (noun) - reason for doing something
disclosed - told to people; revealed