Among seven workers pulled out from debris, one died on the spot, four were admitted to the Ha Nam General Hospital in critical condition, and two others were taken to Duy Tien hospital, a nearby district medical centre.
In the evening, two more workers died at the Ha Nam General Hospital, raising the death toll to three.
Initial investigations show that piles of scrolls of cloth behind the wall might have triggered the wall to fall.
Provincial relevant agencies are supporting the bereaved, clearing the ruins, and investigating the cause of the accident.
