A children’s hospital in Mexico City was nearly leveled when a gasoline tanker truck exploded Thursday, killing at least two. More than 60 people were injured in the blast, the mayor said. An unknown number of people are also trapped, but there are concerns that adults and babies are beneath the debris. The accident is believed to have occurred after a hose burst when the truck was supplying natural gas to the hospital. Firefighters were trying to control a leak in the hose when the explosion occurred.