At least 14 people were killed and 28 others were injured when scaffolding collapsed at a construction site in central Vietnam.

The deputy police chief in Ha Tinh province, Bui Dinh Quang, said Thursday that all the victims were Vietnamese subcontractors hired to work on a seaport breakwater project.

He said it was not known if any other workers were trapped in the rubble. Police and rescue workers are still searching at the scene of the Wednesday night accident.

Dinh Ninh Dan, 27, one of the survivors, said the workers were cleaning a frame for a giant concrete block for the breakwater when the scaffolding collapsed. There were more than 40 workers on the scaffolding at the time of the accident.

He said nearly an hour after they started work the scaffolding shook twice and many workers panicked and began running to an elevator before someone said there was no problem.

“After 10 more minutes, the scaffolding which was about 20 meters (65 feet) high, suddenly collapsed..."