Bahrain jailed 57 Shiite citizens, and stripped their nationality of all of them except one, for an alleged plot to bomb sites across the kingdom. Bahrain human rights groups condemned the "unfair trial" and sentences.
Bahraini state news agency, BNA, said the group plotted to attack "policemen, vital sites and security locations, including an embassy" which is the Saudi embassy in Manama and the King Fahd Causeway connecting Bahrain and Saudi Arabia, the Gulf Daily News reported.
Shiite-led protests across the kingdom in 2011 plunged the country in relative unrest. Defendants were given harsh sentences ranging from three years to life in prison, rights groups accuse the sentences of being politicised.
Bahraini activists confirm the sentenced Shiites include minors. Only four people were acquitted. In a statement, two Bahrain advocacy groups said nine of those found guilty were under the age of 18.
Sentenced defendants mainly belong to Bahraini Shia opposition group Al Wefaq, and a banned association, Al Wafa.
"Bahrain's politicised courts are disenfranchising an entire generation of Bahrainis with unfair imprisonment," said Husain Abdulla, of Americans for Democracy and Human Rights in Bahrain.
In January, Bahrain stripped citizenship from 72 people on the grounds of damaging national security.