A prosecutor for the state of North Rhine-Westphalia said on Monday that 11 security guards working at emergency centers for asylum seekers were under investigation over several alleged incidents of assault..at a center in the town of Burbach, which is a temporary home to some 700 refugees. A police investigation began after authorities found out about mobile phone pictures and videos reportedly showing the abuse...According to chief prosecutor Johannes Daheim, five security officers from the Burbach home were under investigation for abuse, suspected of grievous bodily harm. If convicted, all could be subject to prison terms of up to 10 years...Both the centers in Burbach and Essen are run by the European Homecare business, which subcontracted operations at the center to security firm SKI. SKI is itself reported to have used subcontracted staff from another firm...Ralf Jäger, North Rhine-Westphalia's regional interior minister, said officials had ordered a check for evidence of possible abuse at all 19 major asylum centers in the region... The German branch of the rights group Amnesty International has called for a full investigation."The fact that people seeking refuge are being abused and humiliated by the security forces who are supposed to watch over them is an outrageous abuse of power," said Maria Scharlau, Amnesty International's torture and abuse expert...