Iran and fellow Shiites across the Arab world had slammed the Bahraini government for calling in forces from fellow Sunni monarchies, claiming that the Saudi-led force was used against Shiite Bahrainis.

The protesters want the ruling Sunni Muslim monarchy, a key U.S. ally in the Gulf, to give up its control over top government posts and all critical decisions.

Bahrain's Sunni monarchy and its Gulf allies claim Iran seeks to gain another foothold in the Arab world through unrest in the tiny country, which hosts the US navy's 5th fleet.

He has however, still will serve a three-year term for "unauthorised" protests against Bahrain's Sunni monarchy.

During last year's Arab Spring, an uprising by thousands of protesters against the Sunni monarchy left 35 people dead, including several members of the security forces.

The clashes mark the second such violence in capital in the past month as Shia-led protesters try to rattle the Sunni monarchy by bringing rallies back into the capital Manama.

Bahrain's appeals court has cut the jail terms of two teachers' union leaders, convicted of calling for the toppling of the Sunni monarchy during last year's protests.

So there's been a proxy contest going on between the Sunni monarchy in Saudi Arabia, allied with the Sunni monarchy in Bahrain, and Iran's revolutionary government throughout.

The charges include illegal assembly and inciting hatred against Bahrain's Sunni monarchy.

The amendments will give Parliament the right to approve cabinets proposed by the Sunni Muslim monarchy and will grant legislators authority to question and remove cabinet ministers.