Brazil and Chile are pushing Haiti's government to reach a political truce and stem the violence that threatens a U.N. peacekeeping mission, Chile's foreign minister said on Wednesday. Brazil is sending envoys to the Caribbean nation to help broker an accord as the 3,000-strong U.N. force struggles to stop killings and civil unrest. U.N. special envoy Juan Gabriel Valdes, a Chilean diplomat, has also urged the Haitian government to bring sparring political groups to the negotiating table. "Without an internal political accord it's going to be impossible to have a solution in the medium- and long-term," Chilean Foreign Minister Ignacio Walker said after meeting Brazilian President Luiz Inacio Lula da Silva. Brazil offered to lead the U.N. peacekeeping force on condition it got support to reconstruct Haiti after a February revolt killed more than 200 people and forced President Jean-Bertrand Aristide into exile after U.S. and French pressure. Brazil, which hopes to win a permanent seat on the U.N. Security Council, has called for more troops and humanitarian aid to help the thinly stretched mission after a wave of violence killed at least 50 people since late September. --More 2227 Local Time 1927 GMT