The Directorate General of Civil Aviation (DGCA) on Friday warned all airlines that are denying boarding to passengers with confirmed tickets on a flight will be viewed seriously and strict action will be initiated against the erring airline, including imposing financial penalties as per regulations.

It also issued notice to the airlines after receiving several cases of denial of boarding to passengers with a confirmed ticket and warned them to comply with the provisions of the civil aviation regulations (CAR) in such cases.