Rescuers are trying to free a 12-year-old girl trapped under the debris of her school building in Mexico City that was turned to rubble by the 7.1 magnitude earthquake that struck the country Tuesday.

At least 25 people, mostly students, were reported dead when Enrique Rébsamen kindergarten, primary and secondary school in the south of Mexico collapsed during the earthquake, the toll from which stands at 237 as of now.

Frida Sofia (full name not disclosed) was believed to have been one of the deceased until heat sensors used by emergency crews picked up activity from under the ruins of the building Wednesday. Witnesses later saw her moving her hand, Mirror reported.

Mexico Earthquake
Rescue workers search through the rubble for students at Enrique Rebsamen school after an earthquake in Mexico City, Mexico, Sept. 20, 2017. Reuters/ Edgard Garrido

Specialist civilian and military rescuers gathered at the scene with digging equipment, ropes and sniffer dogs, and began battling their way through the wreckage, trying to get to the trapped child, who was communicating with the rescuers.

As the rescuers continued to communicate with Sofia, she told them there were two more students trapped near the place she was. However, she was not sure whether they were alive or not.

All local channels in Mexico City were broadcasting live coverage of the rescue efforts from the scene. An ambulance and a group of doctors were also on standby for the hopeful moment when the girl will emerge from the tiny opening through which rescuers were carefully inching their way to her.

Sofia was believed to be trapped between broken furniture and concrete slabs. The efforts of the rescuers were slowed down comparatively as the concrete ceiling above the opening through which they were trying to reach Sofia was held up by makeshift wooden props. Any sudden movements would have brought it crashing down, nullifying all the progress they had made.

"We have a lot of hope that some will still be rescued," David Porras, one of many volunteers assisting in the search of Sofia, said, Daily Star reported. "But we're slow, like turtles.”

As hours flew by and day turned to night, rescuers requested the press and cameramen present on the scene to turn on their flashlights and shooting beams to help them in their rescue mission.

Frida Sofia
Rescue workers search through the rubble for students at Enrique Rebsamen school after an earthquake in Mexico City, Mexico, Sept. 20, 2017. REUTERS/ Edgard Garrido

Also watching the rescue operations were many anxious parents staying behind in hopes that their missing kids are not in the list of the dead.

Eleven children have been rescued so far from the debris of the building and rescuers continue their efforts to try and rescue more trapped people.

Often during the rescue efforts, workers would hold up clenched fists, signaling everyone to be quiet and listen for muffled cries of children who might be trapped in the rubble. Witnesses on the scene would then report hearing cries like “Can you hear us?” coming from under the ruins, where rescuers would gather and start digging.

Prayers for Sofia flooded Twitter as people stayed up late, hoping for the girl’s speedy rescue:

This is the second massive earthquake to strike Mexico within the span of a fortnight. The first earthquake — of 8.2 magnitude — occurred on Sept. 8, killing more than 60 people.