The U.S. Department of Transportation has ordered a Los Angeles-based bus company to cease operations after concluding it was endangering public safety.
The Department of Transportation's Federal Motor Carrier Safety Administration says its investigators found the Its Good Promotion tour-bus company did not regularly screen its drivers for drug or alcohol use or regularly inspect its vehicles.
They also allegedly illegally allowed at least four other "unsafe bus companies" that the government had shut down to keep operating under its name and federal registration number, NBC4 reports.
Safety officials say a spot inspection of a bus attempting to cross the border from San Diego to Mexico earlier this month set off an investigation after 17 serious safety defects were found.
Its Good Promotion officials could not be reached for comment Saturday.
The company's office phone has been disconnected and a message left at a company official's home was not immediately returned. The company owner, John Andrew Ciego of Los Angeles, declined to speak with a KPCC reporter.
This story has been updated.