Updated

Federal regulators have ordered a discount bus service operating between Boston and New York City's Chinatown to pull its entire fleet off the road for safety inspections.

Tuesday's announcement by the U.S. Department of Transportation's Federal Motor Carrier Safety Administration comes after Massachusetts officials found serious problems with eight Fung Wah buses, including cracks in their frames.

The company had already agreed to take 21 buses off the road but the order removes all 28 from service for "thorough and detailed" inspections.

The order did not shut down the company and state officials said Fung Wah continues to operate after chartering other buses.

Fung Wah has a history of troubles, including a $31,000 fine for safety violations linked to a 2006 rollover that injured dozens of passengers.