The ISIS terror organization planned a New Year's Eve attack on the Turkish capital of Ankara, Turkish government officials revealed after they arrested two militants belonging to the group on Dec. 30.

The two men allegedly sought to attack the capital city's central Kizilay Square, where large crowds traditionally gather to welcome the new year, The New York Times said based on reports by the semi-official Turkish news agency Anadolu.

The militants' names and nationalities were not disclosed, but local media claimed both were of Turkish origin and had made trips to Syria. ISIS controls large swaths of territory across Syria and neighboring Iraq, and has claimed responsibility for the recent terror incidents in Paris and San Bernardino, California, among other attacks.

Turkey and Syria share a border that extends for some 550 miles, and some of the border territory on the Syrian side is controlled by ISIS, NBC News detailed. The frontier has frequently been used as a transit route by would-be jihadists, ever since Syria descended into civil war between ISIS, dissidents and forces loyal to dictator Bashar al-Assad.

The arrests took place in a low-income neighborhood of Ankara. Authorities seized suicide vests armed with bombs that were fortified with ball bearings and metal sticks, The Associated Press noted, also based on Anadolu reports.

Earlier this year, Ankara suffered a terrorist attack with more than 100 casualties, when two suicide bombers assaulted a peace rally outside the main train station downtown.

Turkey has since launched a wide-ranging crackdown on suspected ISIS militants and arrested more than 350 individuals. The Turkish government suspects that as many as 1,200 individuals living in the country may have ties to ISIS, which calls itself the "Islamic State."

The two suspects arrested on Dec. 30, meanwhile, were interrogated at police headquarters in Ankara, NBC News detailed. Their capture came only a day after Belgian authorities arrested two people on suspicion they were planning a holiday attack in the central European nation.