A Bahraini appeals court has adjourned a case involving Twitter comments by prominent rights activist Nabeel Rajab for another month as prosecutors consider new charges against him over online comments.

Defense attorneys had expected an appeals decision Sunday, but lawyer Jalila al-Sayed says the court postponed the case until May 4 after prosecutors presented additional arguments. Rajab is appealing a six-month jail sentence issued in January for insulting government ministries on Twitter.

He was taken into custody Thursday as part of a separate investigation and could face new charges over recent online comments, including posting about Bahrain's participation in Saudi-led airstrikes in Yemen.

Bahrain has faced more than four years of unrest following widespread street protests led by the Shiite majority seeking greater political rights from the Sunni monarchy.