A court in Bahrain has sentenced 139 people to prison, and revoked the citizenship of all but one, after convicting them of terrorism charges, BBC repoirts.
Sixty-nine defendants were given life sentences, while the others got terms of between three and seven years.
They were accused of setting up a cell linked to Iran's Revolutionary Guards.
The Sunni-ruled kingdom has accused Iran of fomenting unrest among its Shia majority community since it put down a pro-democracy uprising in 2011.
Iran supported the uprising, but it has repeatedly denied backing the local Shia militant groups that have carried out attacks on security forces.
Fifty-eight of the defendants were tried in absentia, a judicial source told AFP news agency.