Bahrain executed on Saturday three men convicted in two separate cases, one involving the killing of a police officer and the other the killing of a mosque imam, the public prosecutor said in a statement, reports Reuters.
Rights groups identified two of the men as Shia activists Ali al-Arab and Ahmed al-Malali, who were sentenced to death last year in a mass trial along with another 56 men convicted and given jail terms on "terrorism crimes".
Alleging they were part of a terrorist cell trained to use heavy weapons and explosives, the court jailed 19 for life and 37 for terms of up to 15 years.
The prosecutor's statement, which did not identify any of the men, said two of them were convicted for crimes including using an assault rifle to kill a police officer in 2017, in attacks orchestrated by what it called Iran-based ringleaders.
Bahrain accuses mainly Shia Iran of stoking militancy in the kingdom, which Tehran denies. Bahrain, a strategic island where the US Navy's Fifth Fleet is based, has a Shia Muslim majority population but is ruled by a Sunni royal family.
International rights groups including Amnesty International, Human Rights Watch and a UN human rights expert had urged Bahrain on Friday to halt the execution of the two activists on the basis of confessions allegedly obtained through torture.
"While in custody the men were tortured by security officers including through electric shocks and beatings. Ali Mohamed al-Arab's toenails were also ripped out," Amnesty International said in a statement.
The authorities have denied accusations of torture and repressing the opposition, and say they are protecting national security from terrorists.
Mass trials became commonplace in Bahrain following a failed uprising in 2011 that was led by members of the Shi'ite opposition and scores of people have been imprisoned including politicians and human rights activists. Many others have fled abroad.
The third executed man was convicted of killing an imam in 2018.
BIRD's Director Sayed Ahmed Alwadaei, a London-based Bahraini activist rights group, said in a statement said:
The executions mark one of Bahrain's darkest days. It appears that the Bahraini government planned this meticulously, timing the executions to coincide with US, EU, and UK legislative recesses in order to avoid international scrutiny.
In London, a protester was arrested for trespassing on a diplomatic premises late on Friday after climbing on to the roof of Bahrain's embassy, British police said.
A video posted on YouTube showed the man unfurling a banner calling on new British Prime Minister Boris Johnson to intervene to stop the executions. It also showed emergency service officials breaking open the door of the embassy to gain access.