A speedboat carrying 23 Salvadoran migrants who were planning to cross illegally into the US capsized in a river in southern Mexico killing six people and leaving another 11 missing and feared dead, officials said.

The people of El Salvador gathered to mark the first anniversary of a 7.6-magnitude earthquake that struck the country on January 13, last year, killing 844 people.

Dozens of volunteers are still digging for bodies buried under mountains of mud in Las Colinas two weeks after the El Salvador earthquake.