PORT-AU-PRINCE, Haiti (AP) -- UN peacekeepers remembered two slain comrades in a solemn memorial Thursday as the United Nations envoy in Haiti vowed to find their killers and redouble efforts to stabilize the divided and impoverished nation.

Dozens of mourners watched as a Muslim imam prayed before the flag-draped coffins of the Jordanian soldiers, both shot to death Nov. 10 while returning to base near a gang-controlled slum in the capital, Port-au-Prince. They were the 13th and 14th peacekeepers to die in Haiti since the UN mission began in June 2004.

"We will spare no effort to apprehend the perpetrators of this despicable crime and ensure they are brought to justice," said Edmond Mulet, UN special representative, who laid a wreath before the caskets.

The killings, by unidentified gunmen on a main road, dealt a blow to the 8,800-strong Brazil-led UN peacekeeping force, sent to restore order after a bloody February 2004 revolt toppled former president Jean-Bertrand Aristide.

After a lull in violence, peacekeepers and Haitian police have been struggling to contain killings and kidnappings blamed on street gangs, some loyal to Aristide, currently in exile in South Africa.

More than 200 people, including 11 police officers, were killed in and around the capital between June and September, according to the Episcopal National Commission for Justice and Peace.

The violence comes less than three weeks before Haitians cast ballots in local and municipal elections that are billed as the final step in the country's return to democratic rule.

Mulet said Jordan's government promised to keep its troops in Haiti despite having lost six soldiers since the mission began — more than any other nation that sent troops.

The latest victims, 1st Lt. Ahmad Mohammed Hassan Ba'irat and Cpl. Rami Wasif Taha Al Mohammed, had finished a day of patrols when gunmen opened fire on their vehicle near Cite Soleil, a vast slum controlled by gangsters. Hassan Ba'irat had arrived in Haiti only five days before his death. Al Mohammed had been deployed since May and was due to return home Thursday.

"Tragic incidents such as this one lead us to redouble our concerted efforts with the government of Haiti to continue to bring about stability in this country," Mulet said.

Meanwhile, anti-UN demonstrators were planning major street protests this weekend calling for peacekeepers to leave Haiti. Poor slum dwellers accuse the blue-helmeted troops of indiscriminately shooting during raids, killing and wounding civilians. The UN says peacekeepers only fire when attacked.

The UN Security Council in August renewed the force's mandate for at least another six months.