A major power outage has struck northern India, plunging cities into darkness and stranding hundreds of thousands of commuters on the region's trains. The Indian capital and its metro service have been affected.
The chairman of the state-run Uttar Pradesh state Power Corporation Avinash Awasthi says it could take up to 12 hours to fully restore the electricity supply in eight northern states, including New Delhi, Punjab, Haryana and Rajashthan.
Awasthi said Monday's outage was the worst to hit the country in 11 years.
He said the power grid collapsed as some states apparently drew more power than they were authorized to do to meet the rising demand during the summer.