In the incident at about 10 am, the victims were working on the construction of a 0.3 m deep drain in the housing area.
Selangor Fire and Rescue Department (JBPM) Assistant Operations Director Ahmad Mukhlis Mokhtar said his office received a call at 10.29 am and despatched nine personnel, a Fire Rescue Tender (FRT) and an Emergency Medical Rescue Service (EMRS) van to the scene.
He said on the inspection, firemen found that the victims were buried by earth and concrete of the U box culvert while they were doing drainage construction work.
"Firefighters managed to bring out the first victim at 11.12 am before another was retrieved about 20 minutes later," he said in a statement here today.
Ahmad Mukhlis said both victims were confirmed dead at the scene and were taken to Sungai Buloh Hospital for further action.
Meanwhile, Shah Alam district police chief ACP Mohd Iqbal Ibrahim said his investigation found that at the time of the incident, there were three workers who were installing concrete drains at the location involved.
He said the ground at the side of the drain suddenly collapsed causing the concrete wall of the drain to break and fall on one of the workers and the other was buried by the falling earth.
"As a result of the incident, the two victims, aged around 30 and 25, suffered severe head and body injuries and were pronounced dead at the scene," he said.
Another worker, however, was not injured.
-- BERNAMA