Gulf carrier Qatar Airways was fined $185,000 by the US Department of Transportation for flying over prohibited airspace, said a report.

According to a statement from the department, the airline was operating  flights in regions in which a Federal Aviation Administration (FAA) flight prohibition was in effect, while carrying the American Airlines code, said a report in Arab News.

The fine follows an investigation by the department’s office of Aviation Enforcement and Proceedings which revealed that iin late 2014 and early 2015 certain Qatar Airways flights carrying the AA code operated in foreign airspace, which was a violation of the federal laws.

The airline has been ordered to cease and desist from future similar violations, according to the statement.

“Airlines have a responsibility to ensure that they do not fly their planes through prohibited airspace,” said US Transportation Secretary Anthony Foxx.

“The FAA forbids US flight operations over certain regional conflict zones around the world. The Department takes aviation safety and security matters very seriously, and will continue to take enforcement action when these important safety and security restrictions are not followed,” he said in a department statement.

The statement did not identify which prohibited airspace the Gulf carrier was operating in.