RNA - The trio have reportedly denied the charge, Arabic-language Lualua television network reported.
The court also sentenced seven other defendants to life imprisonment while it stripped eight others of their nationality.
Thousands of anti-regime protesters have held demonstrations in Bahrain on an almost daily basis ever since the popular uprising began in the country on February 14, 2011.
They are demanding that the Al-Khalifa family relinquish power and let a just system representing all Bahrainis be established.
Manama has gone to great lengths to clamp down on dissent. On March 14, 2011, troops from Saudi Arabia and the United Arab Emirates were deployed to Bahrain to assist the government in its crackdown.
Scores of people have lost their lives and hundreds of others sustained injuries or got arrested as a result of the Al-Khalifa regime’s crackdown on anti-regime activists.
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