Protected by the heaviest security ever seen on his trips, Pope Francis on Sunday preached reconciliation in the divided Central African Republic, a nation racked by bloodshed between Muslims and Christians.

As the pope's Alitalia plane touched down from Uganda to start his first visit to a war zone, attack helicopters patrolled the skies and armored personnel carriers from French and U.N. peacekeeping forces waited outside the airport.

Special security forces wearing patches of the yellow and white colors of the Vatican flag were on hand to help his normal Vatican security retinue.

In an unprecedented precaution for papal trips, a U.N. soldier armed with a rifle rode in each of the mini-buses carrying reporters accompanying the pope.

Bangui, the capital of the former French colony, has seen a surge in clashes that have left at least 100 people dead since late September, according to Human Rights Watch.

France, which has around 900 soldiers deployed in the country, warned the Vatican this month that the visit could be risky but the pope was determined to go to the majority Christian nation.

Francis was driven in to the presidential palace, for much of the way in an open popemobile, and then to a camp housing nearly 4,000 people displaced by the violence.

"Work, pray, do everything for peace," he said at the camp. "But remember, peace without love, friendship and tolerance is nothing. I hope that all Central Africans can see peace," he said.