Hundreds of U.N. peacekeepers raided a slum filled with gangs loyal to ousted President Jean-Bertrand Aristide on Wednesday, killing six gunmen. In a raid on a house in Bel-Air, a ghetto in the capital of Port-au-Prince, troops freed a kidnapped woman who was being held bound and blindfolded by armed men, said U.N. military spokesman Lt. Col. Jorge Smicelapo. The raid touched off a gunbattle that killed six suspected gang members and injured five, Smicelapo said. The woman was unharmed. The Brazilian troops suffered no casualties during the eight-hour offensive, Smicelapo said.Local Radio Metropole reported that the kidnapped woman was an employee of the Haitian Red Cross. Smicelapo could not immediately confirm that report. About 300 soldiers participated in the operation, one of the biggest U.N. offensives in weeks against armed gangs accused of waging a campaign of violence that could undermine elections later this year. Troops detained 13 suspected criminals and turned them over to Haitian police, Smicelapo said.