ISTANBUL (AP) — Turkish President Recep Tayyip Erdogan says that the U.S. made a mistake in airdropping weapons to Kurds defending the Syrian city of Kobani from the Islamic State group.

Erdogan told reporters in reporters in Ankara on Wednesday that the move was a mistake because some of the weapons ended up in IS hands.

According to Turkey's private Dogan news agency, Erdogan said: "It turns out that what was done was wrong."

The Syrian Observatory for Human Rights said Tuesday that the Islamic militants seized a small part of the airdrop that included hand grenades, ammunition and rocket-propelled grenade launchers.

The caches were airdropped early on Monday to Kurds in embattled Kobani, near the Turkish border. Differences about how to defend Kobani have sparked tensions between Turkey and its NATO partners.