Police and church members were searching for two Mormon missionaries who vanished while hiking a volcanic peak on this eastern Caribbean island.

The missionaries, identified by police as American and British, were last seen Monday, said Police Cmdr. Jean Michel Robinet. He declined to give their ages and names, saying only that the American was from Utah and had arrived in November, some five months after the Briton.

The Salt Lake City-based Church of Jesus Christ of Latter-day Saints said Wednesday that one missionary was from Utah and one was from New Zealand but did not release their names.

Police have searched dense vegetation surrounding Mount Pelee since late Monday but have not found any trace of the hikers.

“It’s possible they fell,” Robinet said. “There are accidents from time to time, but they’re rare.”

Church spokeswoman Kim Farah described the missing pair as “young men” from Utah and New Zealand who were serving in the West Indies mission on the French island of Martinique.

“Church leaders and local church members are assisting authorities in their efforts,” Farah said from church headquarters in Salt Lake City. “The families of the missionaries have been notified.”

Mount Pelee, which rises nearly 4,600 feet, is a popular attraction in the French Caribbean island. The volcano, which is still active, erupted in 1902, killing tens of thousands of people. The most recent serious eruption was in 1932.