BERLIN – German police swarmed the main train station in the city of Dusseldorf after an ax attack left several people injured, authorities said.

Dusseldorf police spokeswoman Anja Kynast said several people had been injured and one arrest had been made. Police were investigating the motive for the attack, she said.

Another police spokesman, Andreas Czogalla, said that at least one of the victims had been seriously injured, and that there were no indications of other attackers. Special units for serious crimes have been dispatched to the scene, he said.

An amateur video apparently shot from the scene showed a shell-shocked eye-witness walking around blood stained floors as police tended to a wounded person on the ground.

“The guy just started striking at people with an ax,” the unidentified man in the video says. “I’ve never seen anything like that in my life, directly next to me he started hitting people with an ax.”

A passenger on a Dusseldorf bound train, Bruno Macedo, tweeted: “Breaking: Man with axe chased by police in Dusseldorf. Station closed. I am in the train things look bad #police #terror.”