Race to save kids in Mexico's rubble - Rescuers labour against odds to save 12-year-old trapped beneath a building

Rescuers search for survivors in a flattened building in Mexico City. (AFP)

TT, Sept. 21 (Reuters): Rescuers laboured against the odds as dawn broke today to save a 12-year-old schoolgirl and other possible survivors trapped beneath crumpled buildings in central Mexico following the country's deadliest earthquake in 32 years.

More than 50 survivors have been plucked from several disaster sites in Mexico City since Tuesday afternoon's 7.1-magnitude quake, leading to impassioned choruses of "Yes we can!" from the first responders, volunteers and spectators gathered around the ruins. At least 237 others have died and 1,900 were injured.

As the chance of survival diminished with each passing hour, officials vowed to continue with search-and-rescue efforts such as the one at a collapsed school in the south of the capital. At the site, navy-led rescuers have communicated with the 12-year-old girl, but were still unable to dig her free.

Eleven other children were rescued from the Enrique Rebsamen School, where students are aged roughly six to 15. Twenty-one children and four adults there were killed.

Rescuers had earlier seen a hand protruding from the debris and the girl wiggled her fingers when asked if she was still alive, according to broadcaster Televisa, whose cameras had special access to the scene to provide nonstop live coverage.

But some 15 hours into the effort, Admiral Jose Luis Vergara said rescuers could not pinpoint the location of the girl, identified only as Frida Sofia. "There's a girl alive in there, we're pretty sure of that, but we still don't know how to get to her," Vergara said.

"The hours that have passed complicate the chances of finding alive or in good health the person who might be trapped," he said.

As Vergara spoke, a human chain of hard-hatted rescuers removed a large chunk of concrete from the floodlit scene. Rescuers periodically demanded silence from bystanders to allow them to hear any calls for help.

As with other disaster sites throughout central Mexico, officials have not employed heavy-lifting equipment for fear of crushing survivors. Some 52 buildings collapsed in Mexico City alone and more in the surrounding states.

Throughout the capital, crews were joined by volunteers and bystanders who used dogs, cameras, motion detectors and heat-seeking equipment to detect victims who may still be alive.

Thousands of people have donated food, water, medicine, blankets and other basic items to help relief efforts. Companies provided free services and restaurants delivered food to shelters where thousands of people have sought refuge after their homes were damaged.

"Faced with the force of nature, we are all vulnerable and that is why we all unite when it comes to saving a life or helping a victim," said President Enrique Pena Nieto.