Prime Minister Manmohan Singh Friday congratulated Trinamool Congress leader Mamata Banerjee for her historic win in the West Bengal elections and Assam Chief Minister Tarun Gogoi, who has steered the party to a third consecutive term.

"The prime minister congratulated Mamata Banerjee and Tarun Gogoi," an official told IANS in this Afghanistan capital, where Manmohan Singh has come for a two-day visit that began Thursday.