Kampala  - Rescue work continued Saturday around the three- storeyed office block that collapsed killing two people and injuring dozens a day earlier in the centre of the Ugandan capital Kampala.

Police revised the number of dead down from an earlier reported three people. At least 20 people - some in serious condition - were admitted to Kampala's hospitals after being pulled from the rubble.

According to witnesses, "at least 200 people" had been trapped after the building slowly subsided down the side of newly-dug foundations between high-rise buildings.

The number of people possibly buried in the rubble however could not yet be verified.

The New Vision newspaper reported that shopkeepers in the building had in the morning of the accident reported suspicious noises in the walls of the building and called for a suspension of the construction work.

Ugandan President Yoweri Museveni declared after the accident that those responsible for such accidents should be "hanged," labelling the construction of poor quality buildings "murder."

Many lives are lost each year in Kampala in accidents involving collapsed buildings which the government blames on poor supervision by city authorities. (dpa)