The candidate of the Five Star Movement (M5S), a populist opposition party, has won by far the biggest share of the vote in Rome mayoral elections, exit polls say.
The M5S' Virginia Raggi has secured 33-37 per cent of the vote against 22-26 per cent for her main rival, Roberto Giachetti of the Democratic Party, an EMG survey for the LA7 broadcaster says.
Another exit poll by the Piepoli Institute for RAI state television estimates that Raggi has gathered 34-38 per cent of the votes, while her competitor Giachetti is on 20-24 per cent.
If it is confirmed that no candidate has cleared the 50-per-cent threshold for a victory, Raggi and Giachetti will go into a run-off on June 19. Pollsters say run-offs are also likely in other big cities like Milan and Naples.