It held up at least 300 trains in the country , Indian railway spokesman says . `` We will take some power from Bhutan , too , '' he said . Officials said it affected seven states in northern India , home to more than one million people . Service was partially restored after about six hours , authorities said . Blackouts become more common during winter every year when demand goes up .
It held up at least 300 trains in the country , Indian railway spokesman says . Officials said it affected seven states in northern India , home to more than one million people . Service was partially restored after about six hours , authorities said . Blackouts become more common during winter every year when demand goes up .