The Army cited two T-Mobile subcontractors for trespassing on federal property after they were arrested Saturday at the gate to Aliamanu Military Reservation, a spokesman said.

Dennis Drake, a spokesman for U.S. Army Garrison Hawaii, said the two men were taken into custody, questioned and released. He said they tried earlier to access Fort Shafter, Shafter Flats and Tripler Army Medical Center, which drew the attention of sentries.

“T-Mobile hired a vendor to help with the fine tuning of our 4G network,” the company said in a statement. “We requested that our vendor not enter any military bases. We are discussing this with our vendor, and we apologize for any concern this may have caused.”

Bomb disposal specialists examined the men’s van Saturday after it was deemed suspicious. Drake had no information on what was found.

He said the case is still under investigation.