The criminal court on Wednesday found three defendants guilty of detonating a blast that wounded a policeman, as well as possessing explosives and damaging police vehicles, the prosecution said, quoted by BNA state news agency.
It said the attack took place on January 10, 2015, in the Shiite village of Shakhoura, near Manama.
Bahrain arrests four Americans, including journalists
On Tuesday, the same court jailed five others for "importing and possessing explosives for terrorist aims", the prosecution said.
Bahrain has been shaken by unrest since it quelled a month-long, Shia-led uprising demanding reforms that erupted on February 14, 2011.
The tiny but strategically important kingdom is connected to regional Sunni powerhouse Saudi Arabia by a causeway. It lies across the Gulf from Shiite Iran and is home to the US Fifth Fleet.
Despite the crackdown on the 2011 uprising, protesters frequently attack police in Shiite villages outside the capital Manama.
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