DETROIT The U.S. government's road safety agency is investigating complaints of fires in a power and charging port in some Chrysler Town and Country minivans. The National Highway Traffic Safety Administration says it has three reports of fires and one injury in minivans from the 2014 model year. The agency says owners complained of fires starting in the ports, which are mounted in a trim piece on the driver's side between the second- and third-row seats. Fiat Chrysler, which makes the minivans, says it's cooperating with the investigation. The agency will determine what caused the fires and how often they happen.