West Bengal Chief Minister Mamata Banerjee today left on a three-day visit to Delhi, a day after the Congress suffered a rout in the Assembly elections in four states, giving rise to intense speculation.

Though Mamata insisted that her visit to the capital was "in the interest of Bengal, not any personal work", the visit nonetheless assumed significance because she had earlier floated the idea of a non-BJP and Non-Congress front of regional parties with an eye on Lok Sabha polls