Negotiators from South Sudan's two warring sides are scheduled to arrive in Ethiopia for peace talks late Wednesday, as the top United Nations official in the country urged both forces to bring the country "back from the brink.", according to AP. Fighting continued Wednesday in South Sudan's city of Bor - a gateway city to the capital, Juba - a government official said. Bor is just 120 kilometers (75 miles) from Juba. The U.N. is "gravely concerned" about mounting evidence of gross violations of international human rights law, including the extra-judicial killings of civilians and captured soldiers, it said on Tuesday. More than 1,000 people have been killed in the violence, says the U.N.