Vietnam's prime minister has ordered a swift investigation into a scaffolding collapse that killed 13 workers and injured dozens more.
A unit of South Korea's Samsung Group involved in the construction project has offered initial assistance to victims' families.
All the victims were Vietnamese subcontractors working on a seaport breakwater project in the Vung Ang economic zone in central Vietnam, about 400km (248 miles) south of the capital, Hanoi.
More than 40 workers had been on the scaffolding for nearly an hour on Wednesday when it shook twice, sending them running to a lift before they were stopped and told there was no problem, labourer Dinh Ninh Dan, 27, said.
"After 10 more minutes, the scaffolding, which was about 20m (65 feet) high, suddenly collapsed. I quickly grabbed an iron bar but fell free," Mr Dan said.
He spoke from Ky Anh General Hospital in Ha Tinh province, where he was being treated for hip pain along with 19 others, 15 of them with serious injuries.
"People were screaming, calling for help from the rubble," said Mr Dan. "I was very lucky to survive."
A total of 13 bodies were pulled from the rubble, said deputy provincial police chief Bui Dinh Quang.
Prime Minister Nguyen Tan Dung urged authorities to investigate the cause of the collapse and "deal with it in a serious manner" according to the law.
Samsung C&T Vietnam, a unit of South Korea's Samsung Group, promised to cooperate fully with the investigation and offered initial support of 30 million dong (£900) for the family of each victim, it was reported.