A federal magistrate has ordered a Utah man held without bail after he was arrested near Limon in a car that contained explosives and several machine guns.

U.S. Magistrate Jill Clifton said Thursday there is a substantial risk that Jorge Alejandro of Kaysville, Utah, might jump bail because he has used a number of different identities.Alejandro is facing federal charges of illegal possession of firearms with serial numbers that were altered or removed. The felony count is punishable by a maximum of 10 years in prison and a $10,000 fine.

Colorado State Patrol trooper Joseph Cullyford stopped Alejandro on I-70 near Limon June 18 because his clean Volkswagen had dirty Oregon license plates. The plates later were found to have been registered to a truck. The vehicle had been reported stolen in California.

At Thursday's court hearing, Pat Lewis, a special agent with the Bureau of Alcohol, Tobacco and Firearms, testified he was summoned to the scene near Limon after Alejandro told the state trooper that the car contained automatic weapons and was wired to explode.

Officers found a number of unregistered firearms in the vehicle, including an M-60 machine gun, a fully automatic M-16 rifle, a MAC-10 submachine gun and silencer, two Smith & Wesson machine guns and a .22-caliber Ruger pistol with silencer. Police also confiscated 12 sticks of dynamite, 41 blasting caps, five homemade bombs, blank birth certificates, photocopies of birth and baptismal certificates and books on terrorism, lock-picking and obtaining aliases, Lewis said.

Federal public defender Michael Katz told the judge that Alejandro has a wife and children and had been a participant in a Mormon church group for three or four years.