NEW DELHI – Chaos gripped major Indian airports Friday as passengers of the country’s biggest airline, IndiGo , scrambled to cope up with widespread flight disruptions and cancellations triggered by newly enforced rules limiting working hours for crew and pilots.

Scenes of frustration played out as passengers slept on airport floors, queued for hours at customer service counters and waited without clear communication from the airline.

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Friday was the fourth straight day of disruptions as the low cost carrier struggles with new regulations that mandate longer rest periods and limit night flying hours to address concerns about fatigue and safety.

The first phase of the rules came into effect in July while the second phase kicked in November. IndiGo struggled to a

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