Research commissioned by the government suggests that migrants may be responsible for most of Germany's rise in violent crime. Researchers say the findings are not surprising because many migrants are single males aged 14-30. This group is most likely to commit crime, irrespective of nationality. Migrants are twice as likely to be reported to police for alleged violent crimes as German nationals, and a third of all victims of violent crimes by migrants are other migrants. The report comes as Chancellor Angela Merkel's centre-right CDU/CSU, after its poor showing in the recent election, prepares for coalition talks with the centre-left SPD. Over a million migrants and refugees, fleeing war and abuses, have entered Germany through the open-door policy, which has led to tensions at home.