Unconfirmed local media reports said the attacker was detained by police.
A man apparently armed with a knife attacked passengers on a busy bus in the northern German city of Luebeck Friday before being overpowered and arrested, authorities said, and nine people were injured.
Police spokesman Dierk Duerbook told the Bild newspaper that no one was killed in the attack.
German news agency dpa quoted police as saying that three people received "medium serious" injuries in the incident, while five others received minor injuries.
"There is now a major police deployment in Luebeck".
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"There are no indications that the man was politically radicalized", police and prosecutors said in a statement. The attack took place at 1.47 p.m. local time (1147 GMT).
Earlier, police in Schleswig-Holstein tweeted that there was a major police deployment under way in the city.
PHOTO: Emergency response stand near the scene where a person had allegedly attacked passengers on a bus in Luebeck, Germany, July 20, 2018.
"We are examining the situation and will give more information later".
Lübeck police were not immediately available for comment.