The Trinamool Congress on Sunday served a week’s ultimatum to the West Bengal government to accept its demands for returning land of “unwilling” farmers at Tata Motors’ car plant site at Singur or face fresh agitation.

On the other hand, Chief Minister Buddhadeb Bhattacharjee warned for the first time that the Tatas would leave the state if there was further delay in accepting the government’s rehabilitation package for farmers.