NICOSIA, CYPRUS - A hardliner who favors even closer ties with Turkey and a tougher stance with rival Greek Cypriots in peace talks has defeated the leftist incumbent in the Turkish Cypriot leadership runoff Sunday.

Turkish Cypriot broadcaster BRT says with 100% of the votes counted, Ersin Tatar secured 51.74% of the vote compared to 48.26% for Mustafa Akinci.

Tatar appears to have benefited from a higher turnout in the runoff, managing to rally supporters from the estimated 200,000-strong electorate who may not have voted in the first round.

Akinci conceded to Tatar in a speech to supporters at his campaign headquarters, congratulating his opponent on his victory.

"We went through an election contest that wasn't normal. ... These results mark the end of my 45-year political career," Akinci said. "I wish good luck to our people."

Tatar declared victory in a speech to his supporters.

Akinci, 72, is a champion of Turkish Cypriots who oppose Turkey's complete domination of their affairs. Tatar, 60, advocates fully aligning Turkish Cypriot policies with those of Turkey, the region's patron.

Turkish President Recep Tayyip Erdogan congratulated Tatar on his election victory.

"Turkey will continue to make all necessary efforts to defend the rights of the Turkish Cypriot people," Erdogan said on his official Twitter account.

The Mediterranean island nation of Cyprus was split in 1974 when Turkey invaded after a coup by supporters of union with Greece. Only Turkey recognizes a breakaway Turkish Cypriot state in the north that is economically and militarily dependent on Ankara. The island's internationally recognized government has its seat in the Greek Cypriot south and is part of the 27-nation European Union.

The tussle between Turkish Cypriots who seek to retain more say in how they're governed and those who want to walk in lockstep with Turkey has been a prominent feature in past leadership races, but this contest seems more polarized than ever.

Akinci has alleged that Turkey has engaged in "unprecedented" interference throughout the campaign in favor of Tatar and that he and his family have received threats to drop out of the race.

"We know that things happened that shouldn't have happened," Akinci said after casting his ballot.

A first test for the winner will be a meeting with Greek Cypriots and Cyprus' "guarantors" - Greece, Turkey and Britain - that U.N. Secretary-General Antonio Guterres is expected to call soon. The aim will be to figure out if there's enough common ground to restart dormant peace talks.

Nearly five decades of U.N. facilitated attempts at achieving reunification based on a federal framework have failed.

Akinci believes that federation is the only way toward a peace accord. Tatar shares the Turkish government view that federation may not be the most viable option and alternatives such as a two-state deal should be pursued.

Tensions have soared this summer in waters off Greece and Cyprus over sea boundaries and energy exploration rights after Turkey redeployed a research vessel near the Greek island of Kastellorizo. The move cast doubts on fresh talks aimed at resolving the dispute.

Turkey insists it has every legal right to search for hydrocarbons in waters where Greece and Cyprus claim exclusive economic rights. The Greek and Cypriot governments accuse Turkey of violating international law. The dispute raised fears of a military conflict between Greece and Turkey, which are NATO members but are strong regional rivals.