International rights groups on Friday urged Yemen's Shiite rebels to free a prominent Yemeni activist who used social media to document the war that has ravaged his impoverished Arab country.
Human Rights Watch said that Hisham al-Omeisy, a vocal critic of Yemen's warring parties, is being held without charges in an undisclosed location after he was detained on Aug. 14 in the capital, Sanaa.
The New York-based group said al-Omeisy's family and lawyers have had no access to him.