Iranian Supreme Leader Ayatollah Ali Khamenei called Saudi Arabia and Israel’s growing ties a “stab in the back” to the community of Islam in a tweet on Monday.

“Revelation of Saudi government’s relations with Zionist regime was stab in the back of Islamic Ummah,” he tweeted, using the term “ummah,” which means the wider, global Muslim “community,” including both Shiite and Sunni Muslims.

Khamenei also accused Saudi Arabia of “aggression” in Yemen, and of doing the bidding of the U.S. He also blamed the U.S. for the recent, failed military coup in Turkey.

“In recent events in #Turkey, strong accusations are raised against Americans being behind coup; if proved, it is a huge scandal for US,” he tweeted.