joining me on the phone from mexico michael o boyle, correspondent for reuters. how many people are you hearing could still be inside the home and potentially at risk? >> we are not entirely sure of that. one city official has said 100 people were in the hospital at the time of the blast. now about 60 people have been accounted for, including about 52 women and children who were evacuated immediately after the blast and plus the seven who have been reported dead. but again, we're still trying to figure out how many people were inside at the time. >> are you hearing anything from your sources about the potential cause of the explosion? >> yeah it appears to be and what officials have said this is an accident that happened when a gas truck was fueling the hospital's gas tanks. there appears to have been a leak from the hose that ran from the truck into the hospital and up to its tanks. so apparently there was an accumulation of gas in the hospital. it was somehow set off which is why we're seeing such a devastating images with a third of the hospital collapsed. >>

joining me on the phone from mexico michael o boyle, correspondent for reuters.ople are you hearing could still be inside the home and potentially at risk? >> we are not entirely sure of that. one city official has said 100 people were in the hospital at the time of the blast. now about 60 people have been accounted for,