Video: Building topples, train derails as powerful earthquake jolts Taiwan

A strong earthquake shook much of Taiwan on Sunday, toppling a three-story building and temporarily trapping four people inside, stranding about 400 tourists on a mountainside, and knocking part of a passenger train off its tracks.

The magnitude 6.8 quake was the largest among dozens that have rattled the island's southeastern coast since Saturday evening, when a 6.4 quake struck the same area. There were no immediate reports of serious injuries.

Most of the damage appeared to be north of the epicenter, which Taiwan's Central Weather Bureau said was in the town of Chishang at the relatively shallow depth of 7 kilometers (4 miles).

The three-story building, which had a 7-11 convenience store on the ground floor and residences on the upper ones, collapsed in nearby Yuli town, the island's Central News Agency said.

Also watch: Super typhoon Nanmadol approaches southern Japan, thousands evacuated