The Department of Health said there were now two confirmed infections in the Philippines, including the man from Wuhan in Hubei province, the epicenter of the outbreak, who died on Saturday.
The man, who was admitted to a government hospital in Manila on January 25, had developed severe pneumonia, the department said.
In China, the death toll from the coronavirus outbreak had reached 304 as of the end of Saturday, state broadcaster CCTV said on Sunday, citing the country's National Health Commission, with more than 14,000 recorded cases of infections.
The man who died was a companion of a 38-year-old Chinese woman, also from Wuhan, who was the first to test positive for the virus in the Philippines.
Both patients arrived in the Philippines via Hong Kong on January 21, the health department said.
While the patient who died was "stable and showed signs of improvement" during his last few days in the hospital, his condition deteriorated in the 24 hours before he died, Health Secretary Francisco Duque told reporters.
"We are currently working with the Chinese embassy to ensure the dignified management of the remains according to national and international standards to contain the disease," he said.
Duque said all measures needed to contain the spread of the virus were being strictly implemented and followed, including by health personnel who came into contact with the two patients.
FAST-EVOLVING
"This health event is fast-evolving and fluid. We are continuously recalibrating our plans and efforts as the situation develops," Duque said.
Some Filipinos were worried after health officials announced the first fatality of the new coronavirus in the Philippines.
"It really is frightening because the virus will spread," said 49-year-old Lyn Romano, who has been wearing a face mask since last week, when the first positive case in the Philippines was confirmed.
Twenty-four patients previously under investigation for infection tested negative for the new coronavirus, while samples from four other patients were still being tested, the health department said.
Passengers aboard the flights of the two positive cases were now being traced.
Cebu Air Inc, which operates Cebu Pacific Airline, said it was working closely with health authorities to contact all passengers aboard those two January 21 flights.
The two patients had taken Cebu Pacific flights from Hong Kong to Cebu and then from Cebu to Dumaguete in central Philippines, the airline said in a statement.
The cabin crew and pilots on affected flights have been quarantined, and the aircraft have undergone thorough disinfection, it said.
Cebu Air and two other Philippine carriers, Philippine Airlines and the local unit of AirAsia Group Bhd, have canceled flights to China this month, joining many others around the world that have done the same.
The health department's announcement came shortly after the Philippine government expanded its travel ban amid the outbreak, to include all foreigners coming from China, Hong Kong and Macau. It earlier had restricted only those from Hubei.
Foreigners who have been to China, Hong Kong and Macau within 14 days of traveling to the Philippines will also be barred from entering the country, aviation officials said.Filipinos have been prevented from traveling to China and its special administrative regions, while those arriving from those places are being placed under 14-day home quarantine.