Bhutan's Prime Minister Tshering Tobgay has invited West Bengal Chief Minister Mamata Banerjee to visit his country, according to Consul-General of Bhutan in Kolkata Dashi Karma Tsering Namgyal. Namgyal had personally handed over the invitation from Tobgay to the chief minister at the state secretariat. "We are waiting for the confirmation and we have requested the chief minister that it should be at a mutually convenient date," Namgyal said.