A resident was killed and 11 others were injured when a suspected gas leak triggered an explosion at a department store in Taiwan.

Authorities said the blast originated from the 12th-floor food court of Shin Kong Mitsukoshi Department Store in Taichung City on February 13.

Dashcam footage shows the concrete debris cascading from the upper floors of the building. Metal panels were strewn across the road, causing heavy traffic.

Taichung Mayor Lu Shiow Yen said an investigation into the cause of the explosion was underway.

Mayor Lu said: 'We felt the shock at my office nearby. The fire bureau would focus on a rescue operation first, but an investigation is underway, and officers are checking whether there are other sources of danger.'

The Taiwanese Shin Kong Group and Isetan Mitsukoshi Holdings Ltd of Japan jointly run the department store.