The Bharatiya Janata Party (BJP) saw an unprecedented victory in Uttar Pradesh Assembly polls with 321 seats.
While the Congress-Samajwadi party alliance bagged 54, the Bahujan Samaj Party (BSP) got 19 and others 18.
The BJP's dominant show in assembly polls has put a big question mark over the political fate of the Samajwadi Party-Congress alliance in the run up to the 2019 general elections.
While accepting the defeat in the politically-crucial state, Chief Minister Akhilesh Yadav congratulated the BJP for its victory and said the SP-Congress alliance will continue in future.
He later submitted his resignation to Governor Ram Naik.
Earlier in the day, BSP supremo Mayawati put the onus on the Electronic Voting Machines (EVMs) for her loss, saying the machine accepted votes only in favour of the BJP.
"The shocking result of the assembly elections indicates that the EVMs accepted votes only in favour of the BJP," she said.