Exit polls published as soon as polling stations around Greece closed at 7 p.m. indicated New Democracy and SYRIZA neck and neck for first place, which would guarantee an extra 50 seats in Parliament.
A combined exit poll showed New Democracy taking between 27.5 percent to 30.5 percent of the vote, while SYRIZA was just behind with 27-30 percent. They were followed by the PASOK taking 10-12 percent of the vote.
A survey conducted by Public Issue between Monday and Thursday last week suggested the following results: SYRIZA 28, ND 27.5, PASOK 13, Democratic Left 7.5, Independent Greeks 7.5, Golden Dawn 5.5 and the Communist Party (KKE) 5.5.
A second wave of exit polls, which will be based on 100 percent of the data collected, rather than 80 percent, is due at around 8 p.m.
The first projection based on actual results will be at about 9.30 p.m.
Given that 0.5 percent represents about 35,000 votes, it could take some time before it becomes clear which party will win the elections.