One person has been killed and several others injured in a bloody knife attack at a supermarket in Hamburg, Germany, according to local police. The suspect has been arrested, however, officials have declined to comment on a possible motive. "We have no clear information as to the motive or the number of wounded," police said in a tweet. The attack took place between Fuhlsbüttler and Hermann Kauffmann in the district of Barmbek, Hamburg just after 3pm local time on Friday, reports BILD. Armed police have set up a security cordon and urged the public to avoid the area as traffic diversions are in place. #Barmbek: Täter verletzte nach aktuellem Stand 5 Personen (eine tödlich). Verdächtiger wurde durch Passanten überwältigt & leicht verletzt. https://t.co/q7k1JyQ6Wj — Polizei Hamburg (@PolizeiHamburg)…