U.S. Coast Guard personnel exchanged gunfire with suspected armed men near the Rio Grande between Texas and Tamaulipas about 10 days before an Oct. 6 report, El País reported. The men were said to have been crossing from the Mexican side; no injuries or deaths were reported.
Authorities in the United States and Mexico began separate operations following the incident, according to El País. The newspaper said the episode had raised concern over possible U.S. action on Mexican territory. It described the incident as occurring on the eastern portion of the Mexico-U.S. border.