WATCH: Aerial footage of Valenzuela factory gutted by fire

Posted above is the aerial footage of the heavily-damaged  slipper factory of  Kentex Manufacturing Inc., which was gutted by fire on Wednesday morning, May 13.

The video was taken using a drone piloted by Philippine Daily Inquirer chief photographer Rem Zamora.

As of posting time, authorities said at least 72 workers were killed while dozens remain missing.

READ: Factory fire death toll hits 72; others still missingDeath toll in Valenzuela factory fire rises to 72

According to investigators, the seven-hour fire started from a front door welding operation, which reacted to the chemical substance used in making slippers.

READ: Welding work sparked Valenzuela factory fire, says survivor

Factory workers were said to have been trapped at the second floor of the slipper factory, which had windows secured by steel bars. Many were believed to have suffocated by the smoke coming from the fire.

READ: Kin of Valenzuela fire victims: Why was there no plan to rescue trapped workers?

Only a few escaped from the fire. NC/KS

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