PORT-AU-PRINCE, Haiti — Angry crowds in a seaside slum attacked a group of Voodoo practitioners Tuesday, pelting them with rocks and halting a ceremony meant to honor victims of last month’s deadly earthquake.

Voodooists gathered in Cite Soleil where thousands of quake survivors live in tents and depend on food aid. Praying and singing, the group was trying to conjure spirits to guide lost souls when a crowd of Evangelicals started shouting. Some threw rocks while others urinated on Voodoo symbols. When police left, the crowd destroyed the altars and Voodoo offerings of food and rum.

”We were here preparing for prayer when these others came and took over,” said Sante Joseph, an Evangelical worshipper in Cite Soleil, near the capital’s port.

Tensions have been running high since the Jan. 12 earthquake killed an estimated 200,000 people and left more than 1 million homeless. More than 150 machete-wielding men attacked a World Food Program convoy Monday on the road between Haiti’s second-largest city of Cap-Haitien and Port-au-Prince. There were no injuries but Chilean peacekeepers could not prevent the men from stealing the food, UN spokesman Michel Bonnardeaux said.

Religious tension has also increased: Baptists, Catholics, Jehovah’s Witnesses, Scientologists, Mormons and other missionaries have flocked to Haiti since the earthquake to feed the homeless and jockey for souls.

Some Voodoo practitioners say they’ve converted to Christianity for fear they will lose out on aid or a belief the earthquake was a warning from God.

Voodoo, or Vodou as preferred by Haitians, evolved in the 17th century when the French brought slaves to Haiti from West Africa. Voodoo’s followers believe in reincarnation, one God and a pantheon of spirits.

Voodoo leaders say that although they do not believe in evil spirits, some followers pray for the spirits to do evil.

”There’s absolutely a heightened spiritual conflict between Christianity and Voodoo since the quake,” said Pastor Frank Amedia of the Miami-based Touch Heaven Ministries who has been distributing food in Haiti and proselytizing.