One rescued in Mexico mine explosion, others still missing

The explosion was triggered when a large amount of methane gas ignited, causing 100 tonnes of coal to collapse, mine owner Altos Hornos de Mexico (AHMSA) said in a statement.

Nearly 300 miners evacuated the mine without incident, the company said.

Coahuila's public safety secretary, Jose Luis Moran, told Milenio television that rescue workers were trying to locate the missing miners.

"We are devoted to the rescue of the affected miners," said Moran. He added that AHMSA has a reputation for safe operations.

The explosion marks the second coal mine disaster at a small coal mine in northern Mexico in the past 10 days.

A July 25 explosion killed seven miners, highlighting lax safety conditions in small mines that are often poorly regulated.

Men have mined the largely unregulated, small "pozito" mines that dot Coahuila for more than a century.

A 2006 methane explosion at the much larger Piedras Negras mine, owned by Grupo Mexico, killed 65 miners.

(Reporting By Liz Diaz; Additional reporting and writing by David Alire Garcia; Editing by Leslie Adler)