Kenya ? Post-election tribal violence claimed its first political victim Tuesday – a young opposition lawmaker – as Sen. Barack Obama and former United Nations leader Kofi Annan urged Kenyans to find a peaceful solution.

Obama, D-Ill., whose late father was Kenyan, spoke on a popular FM radio station and urged President Mwai Kibaki and opposition leader Raila Odinga to negotiate without conditions.

“To refuse to do so ignores the will of Kenyans and the urging of the united international community,” the Democratic presidential candidate said on Nairobi’s Capital FM. “Now is the time for Kenya’s leaders to rise above party affiliation and past divisions for the sake of peace.”

But at talks presided over by former U.N. Secretary-General Annan on Tuesday, neither Kibaki nor Odinga signaled that he’d give up claims to the presidency.

More than 800 people have died in the violence in recent weeks after Kibaki claimed victory in an election that neutral observers said was rigged.