West Bengal Chief Minister Mamata Banerjee on Saturday congratulated winners in the assembly polls and advised the losers to not lose heart.

"Congratulations to winners in different states. Congratulations to the voters for making their choice. To the losers, don't lose heart. In a democracy, we must respect each other because some will win, some will lose. Trust the people," Banerjee said in a tweet.

The Congress was set to return to power in Punjab, after being out of power for a decade, while the Aam Aadmi Party was set to be the main opposition. It was also leading in Manipur.

The BJP was set to sweep back to power in Uttar Pradesh after 15 years, as well as the neighbouring hill state of Uttarakhand.

The situation is not clear yet in Goa where the Congress and the BJP were neck and neck.