A man handed a knife on bus in the northern German and hurt people, there were 9 people get hurt, including the 6 people with a knife cut, 2 falling down and the driver was punched. The statement said that there is not any proves that the man has political bias. When the experts examined the backpack, they found a flammable substance but not explosives. The reason why they examined the backpack is someone claimed that they saw the smoke was coming out from the backpack. The statement claimed that they have not found any proves to express why the man hurt people on the bus.