For tea drinkers, it doesn't come much better than a cup of hand-picked Darjeeling - India's best known tea grown in the mountains of West Bengal.

But now, local residents are demanding the area become a new separate state - called Gorkhaland.

Their argument is not new, but it's been given fresh impetus by the announcement last month of the division of another Indian state.

As Yogita Limaye reports, the protests are threatening tea production and firms say they face big financial losses.