Via Daily Mail:
US Boarder officials were shot at from a Mexican riverbank as they patrolled the Rio Grande River by boat early Friday morning, US Customs and Border Protection (CPB) said.
Shots rang out while the agents were patrolling near Fronton, Texas, the Rio Grande City Station Marine Unit reported.
Agents saw four people with automatic weapons firing from the Mexican side of the riverbank.
More than 50 rounds were fired and the boat was struck several times in the hail of gunfire.