Updated

A discount bus service running between New York and Boston has been shut down after being barred from operating out of a Boston bus terminal until further notice.

Federal regulators had ordered Fung Wah's entire fleet of 28 buses off the road for safety inspections after Massachusetts inspectors found problems, including cracked frames. But the company continued to operate using chartered vehicles and three buses that passed inspection.

On Wednesday, the service was shut down following a letter from the Massachusetts Bay Transportation Authority. The letter said the agency it was suspending Fung Wah's right to operate at South Station over safety issues.

A woman who answered the phone at Fung Wah's New York office confirmed the service was not running.