TOKYO (Reuters) -Toyota Motor, Japan's biggest automaker, has suspended operations at three lines in two domestic assembly plants due to an accident at a supplier's facility, a company spokesperson said. The incident at supplier Chuo Spring, which makes engine and valve springs used in vehicles, also halted some production at group companies Toyota Auto Body and Toyota Industries, the spokesperson said. Production in five lines at three Toyota Auto Body plants - all of the unit's lines - was stopped due to the accident, affecting production of minivans such as the Alphard as w...