Nearly 12,000 people were also evacuated from their homes in the Bicol region after the low-pressure area, locally named "Usman", hit the eastern side of the country on Saturday, the office said.
Manila - Twenty-six people have been killed in landslides and floods caused by a tropical depression that brought heavy rains over the eastern Philippines, police and emergency officials said Sunday.
CNN reported dozens of areas were without power due to infrastructure damage.
At least 61 people have been killed and another 18 remain missing, the national disaster management agency reported, according to the New York Times.
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Most of the victims died in landslides, including a family of three who were sleeping when their house was buried in Legazpi City in Albay province, 336 kilometres south-east of Manila, police said.
A regional office of the disaster agency said it was working to confirm the deaths of 38 people in the Bicol region, located south of the main island of Luzon. "The figure can still go up because there are reports of missing".
But he said it had been raining in Bicol even before Usman made landfall and brought torrential rains and landslides.
Many of those who perished were due to landslides and floods, the region's civil defense office said in a report.
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Filipino residents wade along a street at a flooded community in the town of Bulan, Sorsogon province. In Eastern Samar, some 1,169 families have been evacuated as a precaution.
Thousands of others were stranded at seaports, airports and bus terminals after dozens of inter-island trips were canceled because of the storm.
It weakened into a low-pressure area after hitting land. The weather is expected to improve in most parts of the country by Monday.
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