Rescue teams are on scene of a coal mine in norther Mexico where a cave-in has trapped a reported nine miners.

Mexico’s president, President Andrés Manuel López Obrador said in a Tweet, “A coal mine collapsed in the municipality of Sabinas, Coahuila, which caused a tunnel to flood” and trapped the workers, he tweeted. “We hope to find them safe,” he added.

The president said 92 soldiers, specialists and four dogs were at the scene assisting rescue efforts.

The Coahuila state government said in a statement that the collapse occurred after the miners breached a neighboring area filled with water.

The Associated Press reported that the mine began operations this year, and the local government said it had not received any complaints or reports of previous incidents. Sabinas is about 70 miles southwest of Eagle Pass, TX.

Local media outlets reported that a miner managed to escape the collapse and alerted authorities.

Milenio television said relatives of the trapped miners gathered outside the mine awaiting information.

Mexico’s worst mining accident also occurred in Coahuila on Feb. 19, 2006, when an explosion ripped through the Pasta de Conchos mine while 73 miners were inside. Eight were rescued with injuries including serious burns. The rest died and only two of their bodies were recovered.

López Obrador’s administration promised two years ago to recover the remaining 63 bodies, a highly technical endeavor that has still not begun.