WASHINGTON, D.C. — The Federal Motor Carrier Safety Administration (FMCSA) is closing down companies left, right and center for the last three weeks thanks to its new “quick strike” safety inspectors.

Beginning in April, the FMCSA sent out a team of 50 “quick strike” inspectors to target high-risk vehicles. Over the past three weeks, the FMCSA says it has shut down companies in Washington D.C., Georgia, Ohio, New York and Utah, reports Land Line.

Most recently, Mexican bus company Autos Zacatecanos’ fleet of buses was shut down immediately. In a surprise inspection, investigators found 34 safety violations, 15 of which meant an immediate hiatus.

The company ran routes from Mexico to Los Angeles, Denver, Phoenix and Chicago.

The FMCSA order to cease operations says that Zacatecanos’ vehicles didn’t meet minimum safety standards and that its mechanics didn’t have the knowledge required to perform repairs.

This year alone, the FMCSA has shut down 13 bus companies and seven trucking companies for safety violations.