A court in Bahrain on Monday has sentenced seven to prison terms, stripping six of their nationality after finding the group guilty of attacking an oil pipeline last year.
According to the state-run Bahrain News Agency, five of the defendants were handed life sentences, one was given 10 years behind bars and another five years.
The charges included forming a “terrorist group” and “training in the use of weapons and explosives”, BNA said.
The Sunni-ruled kingdom has stripped hundreds of its citizens of their nationality and jailed dozens of high-profile activists and religious clerics since Shiite-led protests demanding an elected government erupted in early 2011.
The Bahraini government has accused Shiite Iran of backing the protests and attempting to overthrow the government.
Tehran denies any involvement in Bahrain’s unrest.
The November 2017 blast cut off the pipeline linking Bahrain’s Bapco refinery with oil giant Aramco’s main pumping station in neighbouring Saudi Arabia’s Dhahran province.
Manama in February accused Iran of training and arming at least two of those involved in the explosion.
Under Bahrain’s citizenship law, amended after unrest broke out in 2011, the authorities can revoke the nationality of anyone who engages in acts deemed “disloyal” to the state.