By the CNN Wire Staff
A suspect in the shooting death of a U.S. immigration agent in Mexico was detained by the Mexican military Wednesday, the country's Defense Ministry said.
In a statement, the ministry described the man as "probably responsible" for the February 15 ambush on a highway in the Mexican state of San Luis Potosi. More details would be made available later, the statement said.
U.S. Immigrations and Customs Enforcement agent Jaime Zapata was killed in the incident, and fellow agent Victor Avila was wounded.
A funeral for Zapata was held Tuesday, where top U.S. officials spoke and vowed justice for his killers.
According to U.S. Rep. Michael McCaul, R-Texas, who said he was briefed by immigration authorities, the pair had been traveling to Mexico City when two vehicles bracketed them and ran them off the road.
Despite the fact that the two agents identified themselves as diplomats, people believed to belong to the Zetas drug cartel opened fire.
It was the first time in 25 years that a U.S. law enforcement agent was killed while on duty in Mexico.
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