The United Nations has suspended talks with Burundian rebels who claimed responsibility for the massacre of at least 160 Congolese refugees at a U.N.-run camp, a spokeswoman for the organization said Tuesday. The U.N. had been brokering peace talks between Burundi's government and the National Liberation Forces _ the last rebel group still fighting in the country's 11-year-old civil war, said Isabelle Abric. "The negotiations have been suspended because they are claiming responsibility for the attack" in which Congolese Tutsi refugees were shot, hacked, stabbed and burned to death, Abric told The Associated Press. "It seems they are not willing to contribute to the peace process."