German police have issued a statement confirming a knife was used in the attacks in Solingen.
The statement from police in Wuppertal, posted on X (formerly Twitter), says:
Yesterday at around 10pm there was an attack at a street festival in #Solingen . An as yet unknown perpetrator attacked several people with a knife.
According to current knowledge, three people were killed and four others seriously injured in the attack.
The #Polizei is deployed with a large contingent and is searching for the fugitive perpetrator.
