Mexican security forces rescued 80 Central American migrants and a Mexican being held captive in Reynosa, located across the border from McAllen, Texas, the Tamaulipas state government said.
"The Tamaulipas Coordination Group, via the mixed operations base made up of state and federal security forces, rescued 81 people who had been deprived of their liberty in the city of Reynosa," the state government said in a statement, without the releasing the date of the operation.
Officials ordered the operation after receiving a telephone tip from a citizen.
The victims told state and federal investigators that they had been held captive for several days in a building in the border city, "where they traveled with the intention of crossing into the United States illegally," the state government said.
The group of migrants - 39 Hondurans, 38 Guatemalans, three Salvadorans and a Mexican - included both men and women, a Tamaulipas Attorney General's Office investigator said.
The people holding the migrants "fled the scene," state officials said.
Tamaulipas, located in northeastern Mexico, was the scene of the massacre of 72 migrants from Central and South America in 2010.
Los Zetas, considered Mexico's most violent drug cartel, is suspected of murdering the migrants.
An estimated 300,000 Central Americans undertake the hazardous journey across Mexico each year on their way to the United States.
The trek is a dangerous one, with criminals and corrupt Mexican officials preying on the migrants.
Gangs kidnap, exploit and murder migrants, who are often targeted in extortion schemes, Mexican officials say. EFE