As the White House tries to curb Moscow's energy income, Vladimir Putin enjoys a warm welcome in India, and promises an "uninterrupted supply" of Russian fuel.

The United States itself still buys nuclear fuel from us for its own nuclear power plants. That is also fuel,” Russian President Vladimir Putin said during his first visit to India in four years.

IndiGo, which controls nearly two-thirds of the domestic market, blamed the disruption on weather, tech systems and rules about rest for crew members. Pilots said the company was cutting corners.

India's IndiGo slumped 4% on Monday, extending its decline from last week, after getting a show cause notice from the country's aviation watchdog. The stock is set for a seventh straight session of losses after it cancelled thousands of flights last week,

India is sending investigators to the US next week to go over data with the National Transportation Safety Board gathered so far on the deadly crash in June of an Air India flight.