An Atlanta-based bus company has been shut down for failing to ensure the safety of its vehicles and drivers, according to a federal agency.

STSC Transportation Services Inc. has been ordered to immediately cease all passenger transportation operations, according to the U.S. Transportation Department’s Federal Motor Carrier Safety Administration.

Efforts were being made to reach STSC for comment. While the company is registered in Georgia, STCS provided service between Philadelphia and New York City. The company describes itself as the first minority-owned bus company serving Philadelphia, with eight daily trips between New York for $10 one way and $20 round trip. The service started last July.

The transportation agency cited a lack of systematic inspections, repairs and maintenance on STSC’s buses. The company is also accused of failing to test drivers for alcohol and illegal drug use, and not ensuring drivers were properly qualified and licensed. The company also has not maintained proper safety records, the agency said.

STSC’s last message on Twitter, in December, said it was closed and under new management.