The Islamic State group has claimed responsibility for the last night attack, but authorities say so far they have found no direct links to the group and believe the suspect, whose name was not released, self-radicalized.
German officials didn't identify the victims, but Hong Kong's immigration department said that among those injured in the attack were four members of a family of five from the southern Chinese city. At least two of the five wounded were in a life-threatening condition.
In the premeditated attack, the suspect boarded the regional train after 9 p.M. Near the Bavarian city of Wuerzburg with an ax and knife concealed in a bag, according to Bamberg prosecutor Erik Ohlenschlager. He said that the suspect had learned on Saturday that a friend had died in Afghanistan, but didn't immediately give more details about the possible link.
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He then concealed himself in a bathroom, and armed himself with his weapons.
"Then, without warning, he attacked the passengers using great force on their bodies and their heads," Ohlenschlager said.
In an emergency call from the train, the suspect could be heard in the background shouting "God is great," as he hacked and slashed.
After the train made an emergency stop, the suspect fled and a few hundred meters (yards) away encountered two women walking a dog. He attacked one from behind, saying "I'll finish you" and yelling a vulgar term for a woman in German, as he hit her at least twice in the face with the ax.
Shortly after, he encountered a police SWAT team that had been in the area on another mission but had been redirected, jumping out at them from bushes brandishing his ax. He was shot and killed.