A court in Western-allied Bahrain sentenced 139 people to jail on terrorism charges on Tuesday and revoked the citizenship of all but one of them, the public prosecutor said, in the latest mass trial in the Gulf Arab state.

Bahrain, which hosts the U.S. Navy’s Fifth Fleet, has prosecuted hundreds of protesters in mass trials and banned main opposition groups. Most of the leading opposition figures and rights activists are imprisoned or have fled abroad.

Such trials, condemned by rights groups, became commonplace after a failed uprising in 2011 that was led by members of the Shi’ite Muslim majority in the Sunni-ruled country and crushed with the help of neighbour Saudi Arabia.

Read more: Reuters