Moscow - On the final day of presidential voting on Sunday, Moscow has accused Ukraine of attempting to sabotage the election, which is widely expected to secure another six-year term for President Vladimir Putin.

According to officials, over half of Russian voters have already cast their ballots in the first two days of the three-day election period. The final day will serve as a test of the opposition's strength, with calls for all supporters to vote simultaneously at noon in an initiative termed "Noon Against Putin."

While sporadic protests have already occurred during the election, recent developments in the conflict with Ukraine have cast a shadow over the voting process. Putin, on Friday, accused Kyiv of attempting to disrupt the election through intensified drone and missile attacks within Russia and on territories held by Moscow in Ukraine. He vowed retaliation against Ukraine.

Local Russian officials reported ongoing strikes by Kyiv's forces on Russian regions bordering Ukraine early Sunday.

Ukraine's President Volodymyr Zelenskiy did not directly address the reported attacks in his Saturday night video address but expressed gratitude to military and intelligence forces for enhancing Ukrainian capabilities.

Kyiv considers the election in parts of its territory controlled by Russia as illegal and invalid. Analysts view Kyiv's daily attacks, primarily targeting energy and key infrastructure, as an effort to destabilize Russians' sense of security and weaken Moscow's war efforts.

The Ukraine conflict, the deadliest in Europe since World War II, has dominated the election atmosphere. None of the other three candidates on the ballot pose a credible challenge to Putin, who remains a dominant figure in Russian politics.

Supporters of Putin's most prominent critic, the late Alexei Navalny, have urged Russians nationwide to vote simultaneously at noon on Sunday across the country's 11 time zones in the "Noon Against Putin" campaign.

Endorsed by Navalny's widow, Yulia Navalnaya, the initiative provides a platform for expressing opposition without risking arrest, as participants legally queue up to vote. However, the Kremlin has cautioned against participating in unauthorized gatherings.

The "Noon Against Putin" initiative emphasized unity and responsibility among citizens, acknowledging fears and the complexity of choices. Over 114 million Russians are eligible to vote, including those in Moscow's designated "new territories" - four Ukrainian regions claimed by Russia but only partially under its control.

By Saturday evening, the Russian Central Election Committee reported that over 63 million voters had already participated in the election.