A three-story building under construction at Richard Abimbola Street, Ilasamaja, Lagos, collapsed, yesterday, killing one and trapping over 20 construction workers. Seventeen persons were rescued alive at about 7.15p.m., with rescue work still ongoing at press time. Most of the workers were reportedly foreigners. The lifeless body of one of the workers was brought out from the rubble at 7.55p.m. Work was reportedly ongoing, when the building suddenly caved in at about 2p.m. The impact of the collapse affected a nearby church, but there was no one in the church.The collapse was blamed on substandard building materials. Residents also stated that owner of the building, who is on the run, bought an existing building and decided to raise it to three floors on the existing foundation. When the press arrived the scene, rescue workers, comprising Police, Red Cross, Lagos State Emergency Management Agency, LASEMA; National Emergency Management Agency, NEMA; Lagos State Ambulance Service, LASAMBUS; Fire Service, among others, were battling to rescue the trapped victims. It was reported that the first set of trapped victims were rescued from the debris by policemen from Isolo and Ilasa divisions, who arrived the scene before others, with the help of some residents. Round 4. 46p.m., 13 persons were rescued alive. Forty minutes later, one more worker was rescued alive, while another was rescued at about 6.10p.m. As rescue work was ongoing, one of those trapped under the debris was heard calling on rescue workers to come towards his side. His voice became faint with time. As at 7.30p.m., none could locate where he was. Some of the survivors were Sunday Gbose, 19; Chinonso Udeh, 37; Matthew Jimoh, 12; Monday Gadonu, 25; Benjamin Uchenna, 56; John Afolabi, 18; Dayo Fatau, 30; Ope Falolu and Agba Ogundele, 40.