InterGlobe Aviation, the company that operates budget carrier IndiGo, Thursday said regulator DGCA is carrying out an audit of its planes and that it has also received a number of show-cause notices to which it has already responded.

"There is currently a DGCA (Directorate General of Civil Aviation) audit on us which is combined with the annual main base audit. We have received a limited number of show- cause notices and have responded to accordingly," IndiGo said in an exchange filing. The filing came in response to a clarification sought from the company.