New Delhi/Mumbai: The country's largest airline IndiGo on Sunday cancelled over 650 flights while the disrupted operations were slowly stabilising as the number of cancellations reduced and more than Rs 610 crore worth ticket refunds were processed for the affected passengers.

While IndiGo will carry out a \"root cause analysis\" into flight disruptions that continued for the sixth consecutive day, Minister of State for Civil Aviation Murlidhar Mohol said passengers have endured mental harassment and distress due to the operational crisis and assured that steps are being taken to ensure accountability is fixed.

The board of IndiGo's parent InterGlobe Aviation has set up a Crisis Management Group (CMG), which is meeting regularly to monitor the situation, an announcement said on Sunday.

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