Rescue workers have called off the search for survivors at a collapsed South African building site, believing there are no more trapped construction workers trapped in the rubble.

One person was killed and dozens injured in yesterday’s collapse of the three-storey building in Tongaat, 30km north of Durban.

Initial reports suggested as many as 50 workers might have been trapped under the rubble but rescue officials, working through the night with sniffer dogs, recovered only one body and discovered no survivors.

The cause of the collapse remains unclear.

District mayor James Nxumalo said local authorities had obtained a series of court injunctions, the latest on 14 November, to halt construction.

Of the 29 injured, two are in a critical condition in hospital, health officials said.