Eight injuries and 10 arrests were reported at a Hamburg refugee centre after a weekend of brawling between groups of Eritreans and Syrians, police reported Monday, according to dpa. Authorities said the first fight broke out Saturday, in the initial intake facility, between about 50 Syrians and Eritreans. One injury was reported, but no arrests. But the violence resumed Sunday, with a brawl involving between 60 and 80 migrants attacking one another with sticks, stones and wooden beams. It took three hours to bring the fighting to an end, reported police. Five guards and two residents were reported injured. Additionally, 10 people involved in the fight were taken into custody, though they were all released Sunday. Authorities have not been able to confirm what prompted the fighting in either case.