Police in Copenhagen are to receive reinforcements from surrounding districts after an apparent gang war broke out in the Danish capital, the Ritzau news agency reported on Saturday. The police believe that there is a violent conflict between two criminal groups, one of which is based in the Indre Nørrebro district, while the other is controlled from abroad, according to a statement. In several districts, increased police presence is intended to prevent further crimes. There are fears that the violence will spill over from Sweden, which has been grappling for years with brutal conflicts betwee…