New Delhi: India congratulated pro-democracy leader Aung San Suu Kyi's National League for Democracy (NLD) on her landslide win in Myanmar by-poll and also welcomed the successful conduct of the elections.

"We welcome the successful conduct of by-elections in Myanmar on April 1, 2012," external affairs ministry spokesperson Syed Akbaruddin said in response to reporters' queries.

The results officially announced so far show that Suu Kyi's NLD has won all 40 of the seats declared out of the 45 for which by-elections were held."We extend our heartiest congratulations to Daw Aung San Suu Kyi and the National League for Democracy. These elections represent a major milestone in Myanmar's transition towards multi-party democracy," Akbaruddin said.

At the invitation of the Myanmar’s government, India had sent senior officials from its Election Commission and journalists from the official media as observers for the by-elections. India's ambassador to Myanmar also observed the elections in the Yangon region.

"We congratulate the Myanmar Election Commission and the government and people of Myanmar on the peaceful and smooth manner in which elections appear to have been held," India said, giving credit for the peaceful democratic elections in the neighbouring country that was ruled by a military junta for four decades.

India's relationship with Myanmar has been enhanced in recent months by the visits to India of the president of Myanmar, the foreign minister, and a high-level parliamentary delegation led by the speaker of the lower house of Myanmar parliament."As a close and friendly neighbour, India remains committed to extending all possible assistance and support to the process of national reconciliation and the further strengthening of democracy in Myanmar," India said.