The latest developments after Saudi Arabia severs diplomatic ties with Iran following the execution of a prominent opposition Shiite cleric and attacks on its diplomatic posts in the Islamic Republic. (All times local.)

10:30 a.m.

Iran's deputy foreign minister says Saudi Arabia's decision to severe diplomatic relations cannot cover up Riyadh's "strategic mistake" in killing a prominent Shiite cleric.

Hossein Amir Abdollahian also accused Saudi Arabia of promoting terrorism and extremism in the Middle East. His comments were broadcast on Monday on Iranian state television.

Saudi Arabia cut diplomatic relations with Iran late Sunday, hours after protesters stormed and set fire to the Saudi Embassy in Tehran. It also followed harsh criticism by Iran's top leader of the Saudis' execution of Sheikh Nimr al-Nimr.

Al-Nimr's execution has opened a new chapter in the ongoing Sunni-Shiite power struggle playing out across the Middle East, with Saudi Arabia and Iran as primary antagonists.