BERLINvanessakadepoker, Augvanessakadepoker. 24 (Xinhua) -- Police in the western German city of Solingen are still investigating a knife attack that happened on Friday, authorities said at a press conference on Saturday afternoon. Investigators do not rule out terrorist motives.

One person was detained by police on Saturday, who is being investigated whether connected with the attack.

The arrested was a 15-year-old person, police said at the press conference.

Three people were killed during the attack on Friday evening at an event marking the 650th anniversary of the city's founding. Eight were injured, among whom four were in serious condition.

According to German newspaper Bild, the arrested person's appearance did not match the attacker's description given by witnesses at the scene.■