Danok Pagoda, an ancient temple thought to contain two Buddha relics, collapsed on Saturday killing at least 20 people and injuring about 150, according to local residents.

It is believed that the casualties were all construction workers and naval personnel who were working to restore the pagoda when it suddenly collapsed.

The incident is immediately shrouded in mystery and superstition with locals and surviving workers telling tales of strange weather, bright red lights and supernatural voices.