PHOTOS Wildfire rips through 20 hectares of Busan forest

A wildfire has devastated 20 hectares of forest, equivalent to 20 football fields, in Busan. Nearly 1,200 firefighters and public officials and 17 fire-fighting helicopters battled the blaze overnight, extinguishing 90 percent of it as of 8 a.m. Nearly 200 people were evacuated as the fire approached their homes. The fire started on Tuesday afternoon. An investigation is under way into its cause. Yonhap

Pillars of smoke are seen at Mount Unbong in Busan, Tuesday. Yonhap

Smoke billows over Mount Unbong in Busan, Tuesday. Yonhap

Nearly 200 people were evacuated from their homes as the fire approached. Yonhap

An investigation into what caused the fire has started. Yonhap

Firefighters battled overnight to contain the blaze. Yonhap

Firefighters extinguish hotspots after the blaze ripped through 20 hectares of forest. Yonhap

The fire was mostly contained by 8 a.m. Wednesday. Yonhap