PUERTO AYACUCHO, Venezuela — Hundreds of indigenous Venezuelans marched Friday to protest President Hugo Chavez's threat to expel a group of U.S.-based evangelists, amid intensifying government scrutiny of foreign missionaries operating in the country.

The protesters — including some who traveled for days by boat from their homes in the dense Amazon jungle — showed their support for New Tribes Mission, which Chavez has accused of "imperialist infiltration" and exploiting indigenous communities.

Also, more than 200 LDS missionaries have left Venezuela in recent weeks after difficulties renewing visas or obtaining new ones.

The Church of Jesus Christ of Latter-day Saints, which has had a presence in Venezuela since 1966, announced Wednesday that the last of its foreign missionaries would be pulling out of the country soon and be reassigned to other countries.

Luis Rodriguez said New Tribe missionaries helped indigenous tribes during hard times when aid from government authorities was scarce or nonexistent.

"The government didn't arrive here to do anything important for us," said Rodriguez, 41, as he marched with fellow demonstrators, some of whom sang hymns.

Two weeks ago, Chavez ordered the New Tribes missionaries to leave the country, accusing the organization, based in Sanford, Fla., of links to the CIA and gathering "strategic information" in the country's Amazon rainforest.

Government officials and other critics of the evangelist group have since backed Chavez's decision, accusing the missionaries of destroying indigenous culture and using their presence in remote, mineral-rich tracts of Venezuela to conduct reconnaissance work for foreign mining and pharmaceutical interests.

New Tribes has denied the accusations and said it hopes to resolve the matter. Supporters say the group has brought much-needed medical, educational and other assistance to impoverished indigenous communities who have long been neglected by the authorities.

"There is no proof of the accusations," said Nereo Silva, a 45-year-old leader of the Piaroa tribe in southern Venezuela.

Liborio Guarulla, the governor of Amazonas state, defended Chavez's decision to expel New Tribes missionaries from the South American nation of 26 million, saying "it's a question of sovereignty."

Guarulla, a government ally, told the state-run Bolivarian News Agency that past administrations largely ignored indigenous groups and their cultures, but left-leaning Chavez has embraced them.

"Venezuela had a debt with the indigenous cultures ... it was this government that first truly took them into account," he said.