Damaged St. Catherine church is seen following a 6.1 magnitude earthquake that also caused the collapse of a commercial building in Porac township, Pampanga province, north of Manila, Philippines, Tuesday, April 23, 2019. The strong earthquake struck the northern Philippines Monday trapping some people in a collapsed building, damaged an airport terminal and knocked out power in at least one province, officials said. (AP Photo/Bullit Marquez)

Damaged St. Catherine church is seen following a 6.1 magnitude earthquake that also caused the collapse of a commercial building in Porac township, Pampanga province, north of Manila, Philippines, Tuesday, April 23, 2019. The strong earthquake struck the northern Philippines Monday trapping some people in a collapsed building, damaged an airport terminal and knocked out power in at least one province, officials said. (AP Photo/Bullit Marquez)

PORAC, Philippines (AP) — A new powerful earthquake hit the central Philippines on Tuesday, a day after a magnitude 6.1 quake rattled the country’s north and left at least 16 people dead, including in a collapsed supermarket, where rescuers scrambled to find survivors.

The U.S. Geological Survey put the magnitude of Tuesday’s quake at 6.4, while the local seismology agency said it was 6.5. The quake was centered near San Julian town in Eastern Samar province and prompted residents to dash out of houses and office workers to scamper to safety.

There were no immediate reports of casualties or major damage from the new quake.

Classes and office work were suspended in San Julian, where cracks on roads and small buildings and a church were reported. Power was deliberately cut as a precaution in the quake’s aftermath, officials said.

Meanwhile, rescuers worked overnight to recover bodies in the rubble of a supermarket that crashed down in Monday’s quake, which damaged other buildings and an airport in the northern Philippines.

The bodies of five victims were pulled from Chuzon Supermarket and seven other villagers died due to collapsed house walls in hard-hit Porac town in Pampanga province, north of Manila, said Ricardo Jalad, who heads the government’s disaster-response agency.

An Associated Press photographer saw seven people, including at least one dead, being pulled out by rescuers from the pile of concrete, twisted metal and wood overnight. Red Cross volunteers, army troops, police and villagers used four cranes, crow bars and sniffer dogs to look for the missing, some of whom were still yelling for help Monday night.

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Authorities inserted a large orange tube into the rubble to blow in oxygen in the hope of helping people still pinned there to breathe. On Tuesday morning, rescuers pulled out a man alive, sparking cheers and applause.

“We’re all very happy, many clapped their hands in relief because we’re still finding survivors after several hours,” Porac Councilor Maynard Lapid said by phone from the scene, adding that another victim was expected to be pulled out alive soon.

Jalad said at least 15 people died in Pampanga province, including those who perished in Porac town. The quake damaged houses, roads, bridges, Roman Catholic churches and an international airport terminal at Clark Freeport, a former American air base, in Pampanga. A state of calamity was declared in Porac to allow contingency funds to be released faster.

A child died in a landslide in nearby Zambales province, officials said.

At least 14 people remained missing in the rice-growing agricultural region, most of them in the rubble of the collapsed supermarket in Porac, while 81 others were injured, according to the government’s disaster-response agency.

The four-story building housing the supermarket crashed down when the quake shook Pampanga as well as several other provinces and Manila, the Philippines’ capital, on the main northern island of Luzon.

More than 400 aftershocks have been recorded, mostly unfelt.

The U.S. Geological Survey’s preliminary estimate is that more than 49 million people were exposed to some shaking from the earthquake, with more than 14 million people likely to feel moderate shaking or more.

Clark airport was closed temporarily because of damaged check-in counters, ceilings and parts of the departure area, airport official Jaime Melo said, adding that seven people were slightly injured and more than 100 flights were canceled.

In Manila, thousands of office workers dashed out of buildings in panic, some wearing hard hats, and residents ran out of houses as the ground shook. Many described the ground movement like sea waves.

A traffic-prone Manila street was partially closed after a college building was damaged by the quake and appeared to tilt slightly sideways toward an adjacent building, officials said. Many schools and government offices, including courts, in the densely packed Manila metropolis were closed Tuesday to allow inspections of their buildings.

Philippine seismologists said the back-to-back quakes in the last two days were unrelated and caused by different local faults.

One of the world’s most disaster-prone countries, the Philippines has frequent earthquakes and volcanic eruptions because it lies on the so-called Pacific “Ring of Fire,” a seismically active arc of volcanos and fault lines in the Pacific Basin. A magnitude 7.7 quake killed nearly 2,000 people in the northern Philippines in 1990.

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Associated Press writer Jim Gomez in Manila contributed to this report.