Several foreigners have been attacked by groups of unknown perpetrators in Cologne city centre. Two Pakis had to be taken to hospital after the attacks on Sunday evening; a Syrian was slightly injured, the police said in a statement. An investigation into serious assault is underway.
...According to information from the Cologne Express, a group of bikers, hooligans and bouncers agreed via Facebook "to go on a 'manhunt' in Cologne city centre". After the New Year's Eve attacks, they wanted to "clean up properly", quoted the newspaper from a non-public Facebook group. Whether there was a connection between the attacks and the call was initially unclear.
According to the police, the first incident occurred around 6.40 pm. A group of around 20 people attacked six Pakis close to Cologne Central Railway Station. Around twenty minutes later a second attack occurred not far away: five perpetrators attacked a man from Frechen with Syrian nationality. The 39-year-old was injured but did not need medical treatment.Source