The BJP and IPFT won 43 seats. The CPI(M) won 16 seats and the Congress none.
The elections in 59 seats in the 60-member Assembly were held on February 18. Polling was countermanded in one seat due to the death of a CPI(M) candidate.
The BJP with a tally of 35 seats won the majority on its own, while its alliance partner the Indigenous People's Front of Tripura (IPFT) bagged eight seats, according to the Election Commission (EC) sources.
The BJP's spectacular performance came as a surprise for many as the saffron party did not even have a councillor in Tripura.
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It had secured less than two per cent votes in the 2013 Assembly election in the state.
According to an EC source, the BJP, which contested in 51 seats in Tripura, has secured over 43 per cent of the votes.
Among the winning candidates in the BJP are Biplab Deb, its state unit president. The state unit vice-president Subol Bhowmick, however, lost to the Left.
On the other hand, the CPI(M)-led Left Front, which had captured 50 of the 60 seats in the 2013 Assembly polls, managed to secure nearly 42.7 per cent this time, the EC source said.
The Left Front had lost in 1988 Assembly polls to the Congress-Tripura Upajati Juba Samity combine by just one seat.
The Congress had a disastrous performance in the state as it failed to win any seat. Its vote share dipped to less than two per cent, the EC source said.
The Congress had won 10 seats in 2013 Assembly election. Six of its MLAs had deserted the party in 2016 and switched over to Trinamool Congress and subsequently joined the BJP last year.
BJP leader Ram Madhav said that the people in the state have voted for a change.
"They have supported our slogan for change," he said, adding that the CPI(M) gave a "spirited fight".
BJP in-charge in Tripura and Assam minister Himanta Biswa Sarma said, "People were fed up with the Manik Sarkar government which has been ruling the state for more than two decades and wanted to get rid of the CPI(M) rule."
"Tribal votes in Tripura are around 35 per cent and they voted for the BJP lock, stock and barrel," he said.
Sarma also dismissed the suggestion that the minorities, particularly the Christians in the northeast, were against the BJP, saying the community "wholeheartedly" supported the party.
Sunil Deodhar, BJP's election in-charge in Tripura said that the very first credit goes to Prime Minister Narendra Modi.
"Modiji has held four rallies in a small state like Tripura. The people of Tripura were starving for development and were waiting for the Modi government", he said.
He said that CPI(M) would continue to oppose the BJP and its "divisive agenda" not only in Tripura but throughout the country.
He alleged that the BJP has used both "money and muscle power in Tripura".
Left Front Convener Bijan Dhar told a news conference here that the BJP had tried to disturb the counting at the Dhanpur Assembly constituency, from where Chief Minister Manik Sarkar had contested.
"The results of the Tripura elections are unexpected and did not reflect exactly what was seen during campaigning," Dhar added.
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