(Reuters) -- Greece's pro-bailout New Democracy party had a lead of more than two points over the SYRIZA leftists in surveys published Friday ahead of the June 17 re-do election that may decide the country's future in the euro.

The result of the election -- which could have grave ramifications for the future of the 17-nation euro zone -- remains finely balanced, as different polls in recent days have produced contradictory results.

The surveys by pollsters Rass and Kapa, among the last before a ban on the publication of polls goes into force on Saturday, put the conservative New Democracy ahead of the anti-bailout SYRIZA leftists by 2.3 and 2.5 percentage points, respectively.

SYRIZA says it wants Greece to stay in the euro but ditch the 130-billion-euro international rescue package and the tough austerity policies prescribed by the European Union and other lenders.

On Thursday, SYRIZA leader Alexis Tsipras said a return to the drachma was not an option, reiterating that Greece must cancel the bailout and renegotiate a new recovery plan.

"There is no danger of us leaving the euro zone. We need to cancel the bailout, which has led to catastrophe," Tsipras said in an interview with the enikos.gr website. "We will replace it with a national plan to resurrect the economy."

Antonis Samaras, the leader of New Democracy, had earlier told supporters that any move to reject the rescue package would plunge Greece into a nightmare that it could not control.

"Those who talk of denouncing the bailout are like little children playing with matches in a gunpowder warehouse, and they are driving us towards an isolated Greece."

Three polls released Wednesday put the two parties neck-and-neck, one putting SYRIZA in the lead. Greece's electoral system gives the first-place party an extra 50 seats in parliament to make it easier to form a government.