At least three women and six children belonging to a fundamentalist Mormon family were killed in a suspected cartel attack in Northern Mexico on Monday. Two of the children were six-month-old twins. Most of the victims of the attack held dual citizenship in Mexico and the United States.

President Donald Trump tweeted about the incident, “a wonderful family and friends from Utah got caught between two vicious drug cartels, who were shooting at each other, with the result being many great American people killed.”

According to the Mexican media, the Mormon group consisted of three mothers and 14 children that set off in a convoy of vehicles from Bavispe in the Sonora state and were heading to a wedding in La Mora in Chihuahua. The convoy was ambushed by gunmen in Bavispe.

According to reports, one vehicle driven by Maria Ronita LeBaron had a flat tire and, as she stopped to address it, the convoy was attacked. Lebaron and four children, including the twin infants, were killed and the vehicle was set afire. As the other two vehicles turned around, they too were attacked.

“This is how we live under the government of @lopezobrador,” Alex LeBaron tweeted. “Mexican Mormons, innocent women and children were ambushed in the Chihuahua sierra, shot and burned alive by the Cartels that rule in Mexico!”