Wurzburg (Germany) (AFP) - Investigators were racing Saturday to pinpoint the motive of a man who went on a knife rampage in the German city of Wuerzburg, killing three people and leaving five seriously injured. The suspect, a 24-year-old Somali who arrived in Wuerzburg in 2015, staged the attack in the city centre on Friday evening, striking at a household goods store before advancing to a bank. He was later overpowered by police after they shot him in the thigh, Bavaria's interior minister Joachim Herrmann said. Investigators found records showing that the man had been treated at a psychiatric institution,...