Saudi Arabia rallied Sunni allies to its side in a growing diplomatic row with Iran on Monday, deepening a sectarian split across the Middle East following the kingdom’s execution of a prominent Shi’ite cleric.

Bahrain and Sudan cut all ties with Iran, following Riyadh’s example the previous day. Saudi Foreign Minister Adel al-Jubeir told Reuters Riyadh would also halt air traffic and commercial relations between the rival powers.

He blamed Iran’s “aggressive policies” for the diplomatic action, alluding to years of tension that spilled over on Saturday night when Iranian protesters stormed the kingdom’s embassy in Tehran. […]