BALDWIN: It was dawn in Mexico City, this gas leak, and then this horrific explosion, tearing through a maternity hospital. Three killed, a nurse and two babies. Dozens more were injured, many of them newborns. In the midst of this horror, you had heroism. Police officers rushing into the chaos to save precious lives. CNN's Rosa Flores has the story.</s>ROSA FLORES, CNN CORRESPONDENT: It's been more than 24 hours since the gas exPLOsion sent shock waves through this Mexico City neighborhood. You can see behind me, crews still working, sifting through the rubble. This hospital is a shell of what it was. It's been a pile of debris that first responders have been going through. I talked to one of those first responders, a police officer, who's picture became very popular on social media because he has an infant in his arms. He's running away from the scene. He says he's no hero. He's humble about what he says he did. He did anything and everything that any other human would have done. Now here's what we know from authorities. Mexico City mayor telling CNN what happened here. He says that there was a delivery truck that was refilling a tank at this hospital. A hose ruptured, triggering this exPLOsion. Now we know that at least three people are dead, including two infants and a woman. At least 70 others are also hurt, including at least 20 infants. As for the three operators of this delivery truck, all three were injured. All three have been arrested. As for the company that they work for, that company did release a statement saying that they are cooperating with authorities. Rosa Flores, CNN, Mexico City.</s>BALDWIN: Rosa, thank you. Just ahead, as this measles outbreak grows, one question you maybe haven't thought about, are fans going to the Super Bowl at risk? Hear what health officials are advising. There's a reason for that? Plus, the rap mogul, Suge Knight, no stranger to trouble, is behind bars, arrested in a deadly hit and run. Hear what happened in the moments leading up to that.
Crews Look for Mexico City Gas Explosion Victims.