Police said three others were also wanted in connection with the bombing in Buri on November 10.
An Interior Ministry statement yesterday said they were members of the February 14 Coalition, a terrorist movement that has claimed responsibility for numerous terrorist attacks in Bahrain including ATM bombings, attacks on car showrooms and explosions that resulted in fatalities.
Two of those in custody are accused of receiving militia training in overseas camps belonging to the Iranian Revolutionary Guard Corps (IRGC).
November’s Buri bombing resulted in major damage to the surrounding neighbourhood, with a total of 30 cars, 38 stores, 28 houses and five public properties affected, Civil Defence previously said.
Hundreds of people were also evacuated from a nearby hospital and homes following the blast, which authorities said was masterminded by Iran.