Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. November 07, 2011 Deadly Violence On Eve of Liberian Run-Off Scott Stearns | Monrovia Liberian police advance past burning barricade as they chase opposition party supporters in Monrovia, Nov. 7, 2011. Photo: AP Liberian police advance past burning barricade as they chase opposition party supporters in Monrovia, Nov. 7, 2011. At least one person is dead in Liberia after fighting between riot police and supporters of a candidate who is boycotting Tuesday's run-off election against incumbent President Ellen Johnson Sirleaf. Liberian riot police stormed the Congress for Democratic Change (CDC) party headquarters, firing tear gas in running battles with stone-throwing supporters of former justice minister Winston Tubman, CDC's presidential candidate. Tubman has called for a boycott of Tuesday's run-off because of what he describes as electoral fraud in last month's first-round election. Tubman supporter Omar Keita was at party headquarters when the violence began. "Our standard-bearer called us to the party headquarters, to come and assemble and have a peaceful demonstration right in the compound without getting out there to create a problem for anybody," he said, explaining that this is when they were attacked by Liberia's Emergency Response Unit, or E.R.U. "We were in the compound and we only saw the E.R.U. running on us firing, firing, firing, firing," he said. Tubman supporters regrouped at the entrance of the CDC compound when riot police charged them again with more tear gas. They retaliated by throwing more stones. U.N. peacekeepers stepped in to separate the sides, pushing back riot police and taking up defensive positions against Liberian forces that assembled at a neighboring petrol station, where dozens of handcuffed civilians sat on the ground. The mostly Nigerian and Malawian U.N. peacekeepers prevented riot police from re-entering the CDC compound for a third time. They successfully defused the situation, maintaining calm in the face of shouting civilians and pushing riot police as a U.N. helicopter circled overhead. President Sirleaf said the CDC boycott violates the constitution because it deprives Liberians of their right to vote. But Tubman said Liberians have the right not to vote as an expression of displeasure with the government. Tubman said he wants the vote postponed so officials can properly examine his party's claim of tampered ballot boxes and doctored tally sheets. Observers from the Carter Center and the Economic Community of West African States say the first-round vote was largely free and fair. The electoral commission says polls will open as scheduled on Tuesday. In a statement printed in local newspapers, electoral commission officials urged voters to cast their ballots without "violence or confrontation" and called the upcoming vote a "crucial decider" of how Liberia continues to move toward peace, democracy and progress after 14 years of civil war. .