Turkish nationalist leader said U.S. military bases located in Greece pose a direct "threat" to Turkey's security, Fox News reported.

"Greece is playing with fire," NHP leader Devlet Bahceli said in an address to Turkey’s parliament. Bahceli claimed US bases pose "a threat to our security" and said "America is using the Greek side as a pawn."

Earlier this month, the U.S. and Greece signed a five-year bilateral military agreement to strengthen defense. The agreement will give the U.S. access to three bases on the Greek mainland.

Bahceli accused the U.S. of using the already troubled Greek-Turkish relationship to try to "push [Ankara] into a hot conflict environment."

After the end of World War II, more than a dozen islands were ceded to Greece under the 1947 Paris Agreement. But in 1964, Turkey claimed that the 12 islands had been "effectively stolen from it in 1912," and offered to give Greece six islands as a sign of good neighborly relations. Greece refused, and the two countries have been in dispute by land, air and sea ever since.

“The subject of 12 islands is our wound that has not yet healed. They have been unjustly usurped from Turkey by foot tricks. The stolen property must be returned to its owner,” Bahceli said.