The parts raised by the construction highway in South Korea on Tuesday collapsed four employees and injured six others, said officials.

Ten people worked near the city of Chones, about 90 km south of Seoul. They fell when they collapsed and trapped in garbage, firefighter reported.

One found in dead crimens. Eight wounded workers were sent to hospitals before two of them were declared dead later. According to the Employees of the Fire Agency, the 10th employee, who was lacking for hours for hours.

The fire agency said in a statement that five were in critical condition.

The cause of the collapse was not immediately known.

Incumbent President Choi Sang-Mok called on the authorities to mobilize all existing staff and equipment to save employees. About 50 fire trucks, three helicopters and about 150 staff were mobilized for rescue efforts.