Iran squares off against Saudi Arabia over Bahrain's annexation

The accord reached between Saudi King Abdullah and the Bahraini monarch Hamas bin Isa Al Khalifa for the oil island's virtual annexation by Riyadh has so incensed Tehran that armed Iranian-Saudi clashes with the potential for all-out warfare may soon become unavoidable, debkafile's Iranian and Gulf sources estimate. Shiite-ruled Iraq would back Tehran in the first Shiite-Sunni collision to be sparked by the wave of unrest sweeping the Arab world - in contrast to the domestic discord raging in Libya and Yemen.
The accord between the Saudi and Bahraini monarchs appeared for the first time in DEBKA-Net-Weekly 487 on March 25. It revealed then that King Hamad had allowed his realm to become the de facto 14th province of Saudi Arabia in order to block the Shiite uprising against him and its knock-on impact on Saudi Arabia's two million restive Shiites next door.
On March 21, Riyadh resolved to expand the terms of reference of the Saudi-Gulf military intervention requested by King Hamad.  Saudi troop reinforcements have been pouring into Bahrain from the last week of March, including armored units and a variety of missiles.
On March 25, Manama announced that planes taking off from Iraq or Lebanon would not be permitted to land in the kingdom.

The second important military step afoot at present is the transfer of Saudi fleet units from the Gulf of Oman and Red Sea to the military section of Bahrain's port, where the US Fifth Fleet has its headquarters and berths its ships. 
March 31, the Iranian parliament's security and foreign affairs committee strongly condemned Saudi military steps: "Saudi Arabia knows better than any other country that playing with fire in the sensitive Persian Gulf region is not in their interests," said the statement.
Saturday, April 2, Iraq's Shiite Prime Minister Nouri al-Maliki chipped in. 
Sunday, April 3, the threatening recriminations coming from Tehran and Baghdad...
The Iranians are therefore expected to send their Bahraini Shiite networks into terrorist action against Saudi military targets very soon.  Riyadh is already braced for these assaults - and not just in Bahrain but in other GCC states including Saudi Arabia proper.
Another Psalm 83 nation.