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.

Bahrain has seen nearly two years of unrest over demands by the country’s majority Shias 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. He is one of dozens to face charges for posting comments on social media.