Berlin (dpa) - A dispute between two extended families with up to 100 onlookers in Berlin has required a police operation and the traffic temporarily paralyzed. A 46-year-old is said to have been injured in the confrontation with a cut superficially on the arm, a 40-year-old came with a stab injury in the back to the hospital, as the police said. In addition, the officials had several place referrals to onlookers pronounced. Previously, members of the two Arab-born families had quarreled in a café. Then the argument shifted outside.