Border Patrol agents with the El Centro Sector apprehended three undocumented Mexican Nationals during an attempt to pass through the Hwy. 86 checkpoint on Wednesday afternoon.
An RV driven by a 23 year-old U.S. citizen was stopped around 2 p.m. by agents assigned to the Indio Station, according to authorities.
He had an 18 year-old woman, also a U.S. citizen, as his passenger.
After a K9 alerted agents to the RV, they discovered a wooden box in the rear storage compartment under the bed of the vehicle with a lid screwed onto it.
Agents said they unscrewed the lid and found three illegal aliens inside the box.
One was 17, one was 19 and the other was 21 years-old.
Authorities arrested the driver and passenger on suspicion of alien smuggling.
The three Mexican Nationals were taken into custody by Border Patrol.