Mexican drug cartel allegedly plotted to blow up Texas dam

It may have been derailed by a stepped-up presence by the Mexican military, which was acting in part on intelligence from the U.S. government, sources said.

The warning, which swung officials into action, was based on what the federal government contends were “serious and reliable sources” and prompted the Department of Homeland Security to sound the alarm to first responders along the South Texas-Mexico border.

Mexico’s Zeta cartel was planning to destroy the dam not to terrorize civilians, but to get back at its rival and former ally, the Gulf cartel, which controls smuggling routes from the reservoir to the Gulf of Mexico, said Zapata County Sheriff Sigifredo Gonzalez, head of the Southwest Border Sheriff’s Coalition, as did others familiar with the alleged plot.

But in the process, massive amounts of agricultural land would stand to be flooded as well as significant parts of a region where about 4 million people live along both sides of the U.S.-Mexico border.