Tribal attack kills 11 in south Sudan-officials

* Violence kills 11 in south Sudan

* Election registration hindered

By Skye Wheeler

JUBA, Sudan, Nov 12 (Reuters) - Tribal revenge attacks have killed 11 people in south Sudan, halting registration in the area for the first multi-party election in 24 years, officials said on Thursday.

Sudanese began to register for the April 2010 vote on Nov. 1 but the process has been laboured especially in the south, where the United Nations estimates a spike in tit-for-tat ethnic attacks has killed at least 1,200 this year.

A 2005 north-south peace deal enshrined power and wealth sharing, democratic transformation, elections and a southern referendum on secession. The civil war claimed some 2 million lives and destabilised the entire region.

Kuol Diem Kuol, spokesman for the south Sudan army (SPLA), said 11 people were killed in the latest attack on Jonglei state on Wednesday.

"One civilian from the Dinka (tribe) was killed, two Dinka civilians were wounded and 8 were killed on the side of the attackers," he said, adding two other villagers were murdered later. The attackers were from the Shilluk tribe.