"Our rescuers are telling us there are people in there shouting, begging to be rescued".
At least eight people were killed when a magnitude 6.1 natural disaster struck the Philippines' main island of Luzon Monday and officials feared dozens could be trapped in the rubble of a collapsed commercial building.
She said 20 persons have so far been rescued from the collapsed supermarket and brought to the nearest hospital.
Social media users on the northern island posted photos of the damage caused by the quake, including cracked walls and swinging light fixtures. Media reported some structures had collapsed and the Clark International Airport, a former USA military base, had suffered some damage and had closed.
Clark International Airport, located about an hour's drive north of the capital, suffered major damage, with at least seven people injured.
Office workers piled out onto the streets as emergency alarms blared, AFP reporters saw, but there were no immediate reports of injuries or damage.
"This was the second strongest quake I've felt in my entire life", she told AFP as she joined hundreds of others in the courtyard of an office building, waiting for the all clear.
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The quake struck at 5.11pm local time (0911 GMT) at a shallow depth of 40 kilometers (25 miles).
"They can be heard crying in pain", she said of those trapped.
The magnitude 6.1 quake hit at about 17:11 local time (09:11 GMT) on Monday, the Philippines Institute of Volcanology and Seismology reports.
"There is ongoing rescue operation in the area", she said.
"The clothes hanging on our line were really swaying".
The Philippines is part of the Pacific "Ring of Fire", an arc of intense seismic activity that stretches from quake-prone Japan through Southeast Asia and across the Pacific basin.