Italian Prime Minister Matteo Renzi is expected to be defeated in a referendum over his proposal to overhaul the constitution, three exit polls indicate.
The state broadcaster RAI's exit poll indicates that 42-46% of the voters backed the reforms put forward by Renzi while 54-58% were against them. Two other exit polls showed that the No vote had a similar lead of at least 10 points, the BBC reports.
Renzi has said that he would resign if he failed to win the referendum. He is due to make a statement at midnight (local time) from his official residence in Rome.
The turnout for the referendum has been "very high by Italian standards", the BBC said. Nearly two-thirds of the electorate had voted in prosperous northern Italy, but the voter turnout was lower in the south.