More than 20 people were killed and 40 injured when two Somali ethnic clans clashed over pasture in an area on the border with Ethiopia, clan-members and Islamist sources said on Sunday, Reuters reported. They said the gunfight between the Saleman and Marehan sub-clans began late on Friday around the border village of Da'dheer, in a 10 km (6 mile) radius in both Somalia and Ethiopia's eastern ethnic Somali Ogaden region. The area is inhabited by pastoralist communities who often cross the border in search of water and pasture for their animals. Fights over scarce resources have occurred in the area before. "One clan wanted their animals to graze on the land, but the other did not allow it," Hassan Hashi Mohamed, a member of the Saleman clan told Reuters by phone, after mediating. He said 12 people from his side had died and 20 had been injured: "(Saturday) was the worst day of the fighting."