HERMOSILLO , Mexico ( CNN ) -- President Felipe Calderon traveled to Hermosillo on Saturday to meet with health officials as the death toll of a day care center fire there grew to 38 children . A crib and baby seats lie outside a day care center Friday in Hermosillo , Mexico , as police cordon off the area . The cause of Friday 's blaze remained unknown , but investigators concluded that the fire did not start inside the ABC Day Care , Eduardo Bours , the governor of Sonora state said . As of Saturday night , 23 children remained hospitalized , 15 of them in critical condition , Sonora spokesman Daniel Duran told CNN . Another 10 children had been transported to other hospitals : eight to Guadalajara , one to Ciudad Obregon , and one to Sacramento , California . A team of 29 medical experts in Hermosillo were deciding if any more victims would be moved to the Shriners Hospital in Sacramento , or elsewhere . In addition , six adults were injured , Duran said . `` Without a doubt this is the worst disaster we 've had , '' Bours told CNN . The president arrived with Interior Secretary Fernando Gomez Mont and Health Secretary Jose Angel Cordova to get firsthand updates from doctors and investigators , the state news agency Notimex reported . Calderon ordered the nation 's attorney general to investigate the blaze . Most of the victims died from smoke inhalation and not burns , Bours said . But the fire was enough for the roof to collapse , he added . At the time of the blaze , 142 children were inside the ABC Day Care . The day care is for children ages 2 to 4 , but Bours confirmed that children even younger were among the victims . All the children at the day care had been accounted for by Saturday evening , Bours said . A severely burned 3-year-old girl arrived Saturday at the Sacramento hospital -- where pediatric burn treatment is a specialty -- and was in critical condition , according to Dr. Tina Palmieri , assistant chief of the burn unit . The child was burned over 80 percent of her body , the doctor told reporters . She said the hospital normally can save just over half of the children with burns that severe . In Hermosillo , a large crowd gathered outside of the emergency entrance of the city 's general hospital and many people consoled each other , video from the scene showed . `` They told me that this happened in a matter of five minutes , '' Hermosillo Mayor Ernesto Gandara told reporters after surveying the scene .
NEW : President Hermosillo travels to Hermosillo to meet with health officials . NEW : Officials believe blaze did not start in center ; attorney general to investigate . NEW : 15 children remained hospitalized , 15 of them in critical condition . 15 child admitted to Sonora in Sacramento , Sacramento .