NEW : President Felipe Calderon travels to Mexico to meet with local officials . NEW : She said the hospital normally can save just over half of the children with burns that severe . Police believe blaze did not burn in center ; attorney continues to investigate . NEW : 23 children remained hospitalized , 15 of them in critical condition . One child admitted to Mercy Hospitals in Sacramento , California .
NEW : President Felipe Calderon travels to Mexico to meet with local officials . NEW : Police believe blaze did not burn in center ; attorney continues to investigate . NEW : 23 children remained hospitalized , 15 of them in critical condition . One child admitted to Mercy Hospitals in Sacramento , California .