A 16-year-old girl has been arrested for allegedly trying to smuggle 12 illegal immigrants while posing as a construction worker on the border fence in San Diego.

The Border Patrol says the girl, wearing a yellow hard hat and safety vest, was apprehended early Thursday.

She was driving a pickup truck marked as belonging to Kiewit Corp. of Omaha, Neb., which is building about three miles of border fencing.

The Border Patrol says a Mexican passenger also wore a hard had and vest.

There were eight men and three women in a modified compartment below the pickup truck bed.

The girl is a U.S. citizen. Her name has not been released.