Most of the 328 people from the Murle ethnic community killed in the July clashes were women and children, said Jongolei Boyoris, a member of parliament in the Jonglei State Assembly. He said 32 children were abducted.
No central government official confirmed Boyoris' claim. The United Nations also has not released any death tolls from the July battles, which took place in an isolated, under-developed and hard-to-reach part of South Sudan. The Murle and Lou Nuer communities have engaged in a series of cyclical battles in recent years that also involve the theft of tens of thousands of cattle.
Col. Philip Aguer, the spokesman for South Sudan's military, said he could not confirm Boyoris' figure and that he was waiting to see details of his report.
Boyoris' figures were collected by a team of county administrators and chiefs who visited 28 villages attacked in the Lou Nuer assault. The majority of those killed were women in a village called Lekla, he said. The women had gone to herd cattle when they were shot by attackers, he said.
Aid groups are working to assist what they say are more than 100,000 Murle who have fled their villages and now are living in the countryside, or bush, without access to food or medical assistance.