[Updated at 9:25 p.m.] Rescue efforts were starting Tuesday night at a mine in northern Mexico where 14 workers were trapped in a mine shaft after an explosion, state media reported.
A local civil protection official said toxic gases had dissipated enough to allow rescuers to begin exploring the mine's tunnels, the state-run Notimex news agency said.
The mine is located just outside Sabinas, Mexico, in the heart of Mexico's coal mining region.
[Updated at 2:11 p.m.] An explosion left 14 miners trapped inside a mine shaft just outside of Sabinas, Mexico, in the heart of Mexico's coal mining region, Mayor Jesus Montemayor Garza told CNN Tuesday.
The blast - at a mine run by the company BIMSA - happened Tuesday morning, the mayor said.
"It's very painful for us," Montemayor said. "At this time we don't know if the 14 miners trapped are dead or alive. It's going to be a complicated operation because of the way the mine shaft was built."
The mine shaft is 60 meters (197 feet) deep, he said.
"We're all hoping the miners are still alive," he added.
Sixteen rescuers from the Coahuila state civil protection agency were working at the site, and 20 other rescuers were in the area ready to relieve the first group, the mayor said.
Methane gas in the shaft was complicating and delaying rescue attempts, he said.
CNN's Rafael Romo contributed to this report.FULL STORY