The London-based rights group Amnesty International says an Egyptian-American prisoner on hunger strike for more than eight months has been transferred to an intensive care unit after his health deteriorated dramatically.

Amnesty called Wednesday for the immediate release of Mohammed Soltan, who was transferred to the hospital a day earlier after prison medics refused to be held liable for his deteriorating condition. The rights group, quoting his family, said Soltan has been passing out and is bleeding from his mouth and nose.

Soltan began his hunger strike over eight months ago to protest his detention and trial. He was arrested in August 2013 as part of a sweeping crackdown on supporters of ousted Islamist President Mohammed Morsi and faces charges including spreading false information and financing an anti-government sit-in.