It happened Wednesday, September 6, at the Truong Hai Auto Corporation in the district of Nui Thanh in central Quang Nam Province at roughly 3:30pm in the afternoon.
Local officials said a full investigation is underway to determine exactly what went wrong. Witness report that a strong gust of wind while the men were on a ladder working on the roof may have contributed to the accident.
Construction on the new plant has been put on hold until officials find out what went wrong.
The two men killed have been identified as Luong Xuan Chuong, 37, and Doan Ngoc Hai, 27, both from Quang Nam Province.