Earlier reports said Rahul Bhatia-led InterGlobe Enterprises, which holds 38.87 per cent stake in IndiGo, had signed an agreement to participate in the Virgin Australia sale. "As regards Virgin Australia, InterGlobe Enterprises has signed an agreement to participate in the sale process and is bound by the confidentiality requirements of that agreement. We are unable to say anything further at this stage," InterGlobe said in a statement.