TEHRAN, Iran (AP) — Iran's elite Revolutionary Guards is saying its forces have shot down an Israeli drone as it approached an Iranian nuclear site.

The Guards issued a statement on its website saying its forces fired a missile at the drone as it neared its uranium enrichment facility in Natanz, more than 300 kilometers (185 miles) south of the capital, Tehran.

The statement did not say when it shot down the drone, nor did it elaborate on how the Guards knew the drone was from Israel. Israeli officials could not be immediately reached for comment.

This comes as world powers negotiate with the Islamic Republic over its contested nuclear program. The West fears it could allow Iran to build a nuclear weapon. Tehran says its program is for peaceful purposes.