A Mexican military helicopter landed Saturday afternoon at Laredo International Airport by mistake, said a spokeswoman for U.S. Customs and Border Protection.

Mucia Dovalina, the uniform public affairs officer for the Laredo Port of Entry, said the helicopter landed about 3 p.m., but she couldn’t share details such as the number of occupants or whether they were armed.

Dovalina said that, following protocol, CBP officers checked out the helicopter’s occupants, then allowed them to return to Mexico in the aircraft.

“The only thing that I can tell you is that they did land here,” she said. “It was by mistake. They were processed and they were returned to Mexico…”

In July, a convoy of soldiers rolled across the international bridge at Donna and were processed by customs and sent back across.

Just in case you wondered about some of the factors affecting the success rate of Mexico’s military operations against drug gangs.