Like Israel, Saudi Arabia was one of the few nations to welcome Trump's decision to withdraw from the Iran nuclear deal.
Iran has rallied groups across the Middle East against what it perceives to be the combined interests of ISIS, Israel, Saudi Arabia and the U.S.
Lebanon, Iraq and Syria worked with Iran and Hezbollah to defeat ISIS in their respective nations, where Tehran's influence angers Saudi Arabia.
Bahrain said the "terrorist act" by Iran was meant to destabilize the mostly Shiite Muslim kingdom ruled by a Sunni Muslim monarchy.
Major General Abdolrahim Mousavi, head of Iran's army, said there would be no Israel in 25 years. His Arab rivals in the Persian Gulf appear to differ.
Iran and Saudi Arabia back opposing factions in wars across the Middle East, and they cut relations entirely last year.
The account retweeted an anti-monarchy Shi'ite militant group several days after Bahraini security cracked down on prominent Shi'ite campaigners.
Rights groups say the move sends a dangerous signal.
Rights groups slam development as a means to target dissent in the Gulf Kingdom.
The marchers are trying to highlight their demands two days before an annual Formula One race
He might be the best basketball player you’ve never heard of, but hoops isn’t why you need to hear Johnny Neumann’s story of weed, women, rebellion and homework