Two workers died and several others were injured after a retaining wall collapsed at a construction site in Doha city yesterday, medical sources said.

The accident happened around 8.30am at Al Jazi building site on the Doha Corniche. Eyewitnesses reported that a retaining wall about 15 metres long and about 4 metres high crumbled on several workers.

Many are still trapped under the debris. More than a 100 rescue workers from the police, civil defence and medical staff along with the site's labourers are removing the debris, trying to rescue the victims.

An Egyptian national and another worker, whose nationality has not been identified, lost their lives in the accident, a nurse at the emergency department at the Al Hamad Hospital told Gulf News.

Another Asian worker was admitted to hospital, but his conditions did not seem to be too serious, the source said.

A few other workers were discharged from the hospital after receiving first aid treatment. The cause of the collapse was not known. Police sources said an investigation would follow.

The construction was undertaken by Gettco, a local contractor. Gettco officials were unavailable for comment on the accident.