 At least 20 people have been confirmed dead, following the collapse of a building in Ikoi Lagos. Nine others are receiving treatment in hospital. Hilari Onoraka brings us up to speed on the rescue effort. Digging continued on Tuesday morning, as rescue workers searched for persons trapped under the rubble of the 21 story building that collapsed the day before. This was the moment two more people were rescued. An ambulance quickly drives them away to the hospital. The general manager of the Lagos State Emergency Management Agency, Femi Okei Oswain Tolu, assures that no one would be left behind. I need to assure all of you that we are on top of the challenges. The operation is still ongoing. It's like all the top haircut on the ground. No body is sure about the number of people still trapped and this is why. Like I said, it's a construction site. People coming. We understand also that some people came in just to inspect. Maybe they wanted to buy or something like that. So we don't know the number because people are just coming in. So we are not sure the number. The collapse building is one of three towers being developed on the site. The deputy governor discloses that an integrity test will be carried out on the others. He also debunks reports that the collapse building had approval for only 15 floors. This particular one was approved for 21 floors. It's not 15. The second building will also be audited in terms of integrity test and of course if we find anything then the appropriate action will be taken. It's important to also announce that we have an agency that's supposed to do this job and that's why they came in around July to check and when they saw the anomalies they shot the site down. The rescue effort is continuing into the night and mid last days Hillary Noroka for PLOS TV Africa.