Sheinbaum says Mexico has no evidence of the shots that sent US troops to the border

President Claudia Sheinbaum said on Monday that Mexico has asked the United States for the evidence behind a reported cross-border shooting and has none of its own. "We asked for all the evidence because we have no evidence," she said. Mexico's National Guard, Army and Navy had not detected shots fired from Mexican territory toward the United States. The remark came a day after US ambassador Ronald Johnson wrote that Coast Guard members had been fired on in Texas, across from Tamaulipas, in late September.

Johnson's post on X said the threat would be swiftly addressed. He also wrote that the US embassy in Mexico was helping coordinate with Mexican forces deploying to the border area where the Coast Guardsmen were fired upon. The US response he described is already in place: 500 troops, helicopters, drones and anti-drone equipment sent to the sector. Sheinbaum's line is that the predicate for that deployment has not been shown to Mexico. The two statements sit side by side. One announces a force. The other says the shots have not been established from the Mexican side of the river.

The location, as Johnson gave it, is Texas opposite Tamaulipas, in late September. He did not name the town, the time of day, the number of rounds, or whether anyone was hit. Al Jazeera, Reuters and the Associated Press carried Sheinbaum's request for the file. No US customs, Coast Guard or Pentagon paper had been published by Monday night with a map, a radio log, or a ballistics note. The public record is an ambassador's post and a president's denial that her services saw the shots.

Tamaulipas is the state that makes the claim heavy. It runs along the lower Rio Grande, opposite the Texas Valley. Cross-border fire in that sector is not a new category of incident. What is new this week is the scale of the US answer, 500 troops plus aircraft and anti-drone kit, tied to a single reported shooting that the Mexican executive says it cannot verify. A deployment of that size is a policy choice. It does not require Mexico's agreement. It does require a story about where the shots came from, and that story is what Sheinbaum has asked to see.

Her government has spent the year arguing that security cooperation has lines. She has objected before when US officials have described operations that Mexican forces did not jointly log. Monday's sentence is in that pattern, with a specific ask attached: the evidence. If Washington produces a radar track, a video, or a recovered round with a direction of fire, the Mexican denial narrows to a detection failure. If Washington does not produce it, the 500 troops remain on the line without a shared factual basis. Johnson's post treats the shooting as given. Sheinbaum's press remarks treat it as unshown.

The Coast Guard detail is the part that does not fit a routine land-border exchange. Johnson said the targets were Coast Guard members. The Coast Guard works the river and the coast, not only the land ports. A shot at a boat crew is a different incident from a shot at a land patrol, and it pulls in a different radio net. Mexico's Navy is the service that would most plausibly have heard it. Sheinbaum included the Navy in the list of forces that detected nothing. That is a narrower claim than a general denial. It says the maritime service on the Mexican bank did not record fire toward the US bank in the period Johnson described.

The late September date also leaves a gap. Johnson wrote on Sunday about shots in late September. The troop movement he attached to the incident was already public enough for him to cite helicopters and anti-drone equipment. Days passed between the alleged fire and the ambassador's post. Mexico's request for the file came after the post, not after the incident. That sequence means Mexican forces were not asked, in public at least, to log a joint review in the first 48 hours. The review is starting now, on the basis of a social media statement.

What happens next is a file or a standoff. Sheinbaum has asked for all the evidence. Johnson has said the embassy is coordinating with Mexican forces in the area. Those two sentences can become a shared incident log, or they can remain two versions of a shooting that one side has answered with 500 troops. The number to watch is not the troop figure, which has already been set. It is whether a round, a track, or a time stamp crosses the river in the other direction.