Edison said it found the deviation from expected results was most pronounced in rural areas, which were likely to have had “the most significant vote manipulation at the polling place level.”

Main opposition groups have called for further protests next Monday after an initial demonstration drew tens of thousands of people outside parliament on Rustaveli’s main boulevard earlier this week.

Georgian observers highlighted numerous voting violations, including vote buying, ballot stuffing and confiscation of voter IDs before the election.

But the electoral commission rejected accusations of bias and denied Zourabichvili’s allegations of so-called carousel voting in Georgia’s new electronic voting system, insisting it was impossible to vote more than once.

Prosecutors subpoenaed the president this week to prove their allegations of fraud, but she said that was their job.