Turkish authorities say they believe Israeli aircraft dropped two fuel tanks found last week near Turkey's border with Syria.
Turkish Foreign Minister Ali Babacan called the incident "unacceptable." He warned against acts that cause tensions, saying they could harm peace and stability in the region. He spoke during a news conference in Ankara Monday with his Syrian counterpart, Walid al-Moallem.
Syria last week said its air defenses fired at Israeli aircraft that had violated its airspace and dropped munitions on Syrian territory. The Israel military refused comment.
At Monday's news conference, the Syrian foreign minister called the alleged violation an "intentional, hostile attack."
Both countries have demanded an explanation from Israel. Babacan says Israel has pledged to provide information in the shortest time possible.
Turkey is one of the few Muslim countries with close ties to Israel.
Peace talks between Syria and Israel have been frozen since 2000.
Some information for this report was provided by AFP, AP and Reuters.