Several wounded when gunmen open fire on convoy in Mexican border town

At least three people were wounded when a convoy of vehicles crossing into Mexico from the U.S. was attacked by armed civilians early Saturday, Mexican authorities said.

The Tamaulipas state security department said the attack happened on the Roma-Ciudad Miguel Alemán International Bridge that spans the Rio Grande and connects the town of Miguel Aleman with Roma, Texas.

Mexico's National Migration Institute said in a news release there were 20 people traveling in the convoy — 16 Mexican nationals and four U.S. citizens — riding in two trucks, a van and a pickup truck.