HACHITA, N.M. -- A Colorado man has been sent packing by organizers of a security watch along the Mexican border in southern New Mexico after he apparently picked up two hitchhiking immigrants.

Organizers of the Minuteman Civil Defense Corps project asked the volunteer, who was in his 50s, to leave about two weeks ago. He was not identified.

Gary Cole, a spokesman for the group, told the El Paso Times that the volunteer gave the two illegal immigrants food and water after giving them a ride.

"This is probably one of the weirdest things. We're scratching our heads. He came down here to be part of the Minutemen and he gives illegal aliens a ride? He was a very dedicated person and appeared to fully understand what we were doing," said Cole.

American Civil Liberties Union volunteers who have been monitoring the Minutemen's activities said the Colorado man may have had more sinister motives.

"It's kind of scary. We don't know what he was planning," Claudia Guevara told the Times. She is an ACLU coordinator.

U.S. Border Patrol officials and prosecutors with the U.S. attorney's office in Albuquerque both investigated the incident. No charges have been filed.

Minuteman and ACLU officials also reported that the Minuteman volunteers called the New Mexico State Police last weekend claiming ACLU volunteers rammed a private fence with their vehicles near Hachita, which the ACLU volunteers denied. No one was arrested.

The Minuteman volunteers, who gained international attention last spring while patrolling the border in southern Arizona, have been watching for illegal crossers in New Mexico and Texas since Oct. 1.