A Japanese bullet train was halted on its way to Tokyo on Monday, after workers discovered leaking oil and a crack in the train's undercarriage. Abnormal sounds and smells were reported after Japan's Nozomi Number 34 train departed from Hasaka Station in Fukuoka city. The Transport Safety Board described the problem as Japan's first "serious incident" involving a bullet train. No other "serious" incidents involving Shinkansen trains have been recorded, since the Transport Ministry introduced its accident-classification system in 2001.