NEW DELHI - Indian Prime Minister Manmohan Singh called Narendra Modi on Friday to congratulate him on his party's thumping victory in the country's general election, Singh's office said in a tweet.
"Prime Minister Dr Manmohan Singh calls Shri Narendra Modi and congratulated him on his party's victory in the Lok Sabha (parliamentary) elections," he said on his official Twitter account.
Results so far show Modi on track to succeed Singh with his opposition Bharatiya Janata Party (BJP) set to trounce Congress and secure the first parliamentary majority by a single party in 30 years.
Congress, the national secular force that has run India for all but 13 years since independence, was set to crash to its worst ever result.
Modi, the 63-year-old son of a low-caste tea seller tainted by anti-Muslim violence in his home state of Gujarat in 2002, wrote on Twitter that "India has won. Good days are coming."
Singh, 81, an economist, will retire from politics after 10 years as prime minister in charge of the centre-left Congress government.