West Bengal Chief Minister Buddhadeb Bhattacharjee on Monday sent a letter to the state's main opposition Trinamool Congress chief Mamata Banerjee, inviting her for talks on the Singur land row. "I've received a letter from Chief Minister Buddhadeb Bhattacharjee. In that letter, he's invited our party for a dialogue over the Singur issue," Banerjee told reporters at her south Kolkata residence.