A fire rages on at a shopping mall Saturday, Dec. 23, 2017, Davao city, southern Philippines.

:: Thirty-seven people were believed killed in a fire that engulfed a shopping mall in the southern Philippine city of Davao, local authorities said on Sunday.

A Bureau of Fire Protection commander at the scene said the chances of the 37 surviving were “zero”, Paolo Duterte, Davao’s vice mayor, who is also the president’s son, wrote in a Facebook post.

The blaze started at the four-storey NCCC Mall on Saturday morning and people were trapped inside, including at a call centre on the top floor, Ralph Canoy, a police officer in the district, told AFP.

Canoy said the fire was still going before dawn on Sunday morning, nearly 24 hours later.

“The fire started on the third floor, which houses products like fabrics, wooden furniture and plastic ware, so the fire quickly spread and it’s taking a long time to put out,” he said.

He said investigators believed some of those likely killed had been trapped in the call centre, which operated 24 hours a day.

“It’s possible that while they were working, they did not immediately notice the fire spreading,” Canoy said of the call centre workers.

He said the reason for the blaze was not immediately known.