The Philippines has been rocked by a 6.5 magnitude earthquake a day after it was hit by a similar tremor that killed almost a dozen people and caused buildings to collapse.
The latest quake struck near Tutubigan, on the island of Samar, just after 1.30pm local time on Tuesday, sending terrified residents, schoolchildren and tourists into the streets as buildings shook.
The tremor damaged homes, businesses and the city hall building in Catbalogan City, and cracked roads in parts of Eastern Samar.
The magnitude was initially pegged at 6.6 and later revised to 6.2 and then 6.5 by the Philippines' earthquake agency, Phivolcs, as the country continued to experience hundreds of aftershocks following Monday's disaster.
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Phivolcs (the Philippine Institute of Volcanology and Seismology) said the strongest effects were felt in Tacloban City, Catbalogan City and the province of Samar, with an intensity of five.
Photos posted online show crowds of children gathered in playing grounds after schools were evacuated, locals who fled their homes, and tourists standing in the street after they ran out of hotels.
There were no immediate reports of casualties. There was no threat of a tsunami.
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The new quake hit amid a search and rescue effort on a neighbouring island that was hit by a 6.1 magnitude earthquake that killed at least 11 people and destroyed buildings on Monday.
About two dozen people were missing after the tremor shook the country's biggest island, Luzon.
Rescue teams were searching for signs of life beneath the rubble of a collapsed four-storey commercial building in the town of Porac, about 70 miles northeast of the capital Manila.
Heavy lifting equipment and search dogs were used as dozens of firefighters, military and civilian rescue teams raced to shift piles of concrete, Reuters reported.
During the night, seven people were rescued and four dead bodies were pulled out of the rubble of the commercial building, which had caved in on a ground floor supermarket, officials said.
"The rescue is ongoing, they are still hearing a sound, no one can say how many were still trapped," Pampanga provincial governor Lilia Pineda said in a radio interview.
The quake, which struck at 5pm local time on Monday, was initially reported as being of 6.3 magnitude and later revised down to 6.1 magnitude.
The earthquake was felt strongly in key business areas of Manila, with residential and office buildings evacuated after being shaken for several minutes.
Train services were halted and roads and sidewalks were clogged by the sudden exodus of workers.
The government declared Tuesday a holiday for civil servants in Metro Manila to allow for safety inspections of buildings.
The international airport in Clark, a former US military base in Pampanga, remained closed for repairs, while parts of a one corner of a historic church in the province collapsed.
More than 420 aftershocks had been felt within about 12 hours of the earthquake.
The Philippines is prone to natural disasters, located on the seismically active Pacific "Ring of Fire", a horse-shoe shaped band of volcanoes and fault lines that arcs round the edge of the Pacific Ocean.
