NEW : The 4 p.m . ET blast blew some of the building 's windows out , according to firefighters . Four of the eight injured children came from same family , hospital says . One child in critical condition , three in serious condition with burn injuries . Comment: Residents say some sort of restaurant was being operated in bottom of building .
NEW : Four of the eight injured children came from same family , hospital says . One child in critical condition , three in serious condition with burn injuries . Comment: Residents say some sort of restaurant was being operated in bottom of building .