( CNN ) -- Seven people , including a toddler , died when fire roared through a three-story home in southwest Philadelphia , Pennsylvania , on Friday night , fire officials said . Firefighters work to put out a fire at a town home Friday night in Philadelphia , Pennsylvania . Six of the victims -- three adults , a teen and two children -- were found in the townhome 's basement , huddled together , Philadelphia Fire Commissioner Lloyd Ayers said . A 2-year-old boy who was pulled from the burning house by firefighters was later pronounced dead at Children 's Hospital , Ayers said . Eleven people , all of Liberian nationality , lived in the basement of the home , he said . Two were rescued by firefighters and two escaped on their own , Ayers said . Watch firefighters at work on the blaze » . There were no stairs from the basement to the upper level and there was only one door leading out , he said . Early clues suggest a kerosene heater may have started the blaze , but the fire marshal has not officially determined a cause , Ayers said . `` We found serious issues in the house , '' he said . The home did not appear to be equipped with smoke detectors , the fire commissioner said . `` We have not found any smoke alarms at all , which we are very saddened by , '' Ayers said . Wade Lee , who lived in the same building , said the landlord had helped tenants work out fire evacuation plans . Lee said the victims often brought his family fresh vegetables from their garden , and the children were a joy . `` Our wishes are with them right now , more so than for ourselves , '' he said . `` Just hearing the children laughing , and not being able to hear that no more is grievous to us all . ''
2-year-old pulled from fire later pronounced dead at hospital . Six victims found huddled together in basement . Eleven people , all of Liberian nationality , lived in the home , fire official says . Basement home had one exit , no smoke detectors , official says .