he floating barrier, which is intended to block migrants crossing from Mexico, was installed last month without federal authorization, according to the US Justice Department, which is suing the state of Texas over its use of the buoys.

The Mexican government has also decried Abbott’s decision to float the buoys. Last week, Mexican Secretary of Foreign Relations Alicia Bárcena Ibarra said her country had sent its second diplomatic note to the US complaining about the barriers.

They not only violate two treaties between the US and Mexico, she said, but a slide that accompanied her remarks claimed that a portion of the 305 meters of deployed buoy is on “Mexican territory.”

López Obrador on Thursday warned that the buoys violated Mexico’s “sovereignty and human rights,” adding that “we are already demanding that these buoys be removed.”