A woman places a placard at the site of a mass shooting where 20 people lost their lives at a Walmart in El Paso, Texas, U.S. August 4, 2019. REUTERS/Jose Luis Gonzalez

MEXICO CITY (Reuters) - The number of Mexicans killed in a shooting in El Paso, Texas has risen to six, Mexican President Andres Manuel Lopez Obrador said on Sunday, adding that seven other Mexican citizens were injured in the attack that killed a total of 20 people.

“We lament these acts and we affirm our conviction that social problems should not be resolved with use of force and incitement of hatred,” he said at a public event.