India, March 7 -- The first message posted from Iranian Supreme Leader Ayatollah Ali Khamenei's X account after his assassination warned of serious repercussions to the "big mistake" the "zionist regime" made, as tensions in the Middle East continued to escalate following the killing of the long-time cleric.

The post comes a week after Khamenei was confirmed dead in the US-Israel strikes on Iran last weekend.

"The Zionist regime has made a big mistake, and its consequences will make the regime desperate, by God's grace," the post said, in what appeared to be a warning directed at Israel. The message came days after Khamenei, 86, was killed in a joint US-Israel military strike on Iranian territory that also targeted senior Iranian offici...