The public prosecutor’s office in Bahrain says six people have been detained for allegedly defaming the country’s ruler on Twitter.

The six, who were not identified, join a growing list of anti-government activists caught up in an Internet crackdown by authorities in the Sunni-ruled Gulf nation.

A Bahraini anti-government protester shouts anti-government slogans as she bangs on a tray during a protest in Sanabis, Bahrain, Tuesday, March 12, 2013. Protesters in opposition strongholds nationwide held noisy rallies Tuesday night, banging on drums, metal trays and pot lids to stir support for a planned “Dignity Strike” on Thursday – when government opponents refrain from going to work, school or shopping and close their stores. Graffiti on the wall includes images of jailed political leaders and reads: “Freedom or martyrdom,” “Dignity Strike 2, our date is March 14,” and “God is greater.” (AP Photo/Hasan Jamali) Close

Bahrain has seen nearly two years of unrest over demands by the country’s majority Shiites for a greater political voice.

The six were detained over the past couple of days and the prosecutor’s statement Wednesday said they will be charged with misusing Twitter and insulting King Hamad bin Isa Al Khalifa.

The arrests come two days after a court acquitted rights activist Yousef al-Muhafedha of spreading false news on Twitter. He is one of dozens to face charges for posting comments on social media.