A gunman was barricaded in a home in Georgia on Wednesday with four firefighters he took as hostages after they responded to what appeared to be a medical emergency call, officials said. The man initially held a fifth firefighter captive in the home, in Suwanee, about 35 miles northeast of Atlanta, but let that person leave to move a fire truck, police and fire officials said. Officials were not releasing details about what happened inside the house or a possible motive but said the hostages did not appear to have been harmed.