LONDON (AP) — Egypt’s most prominent imprisoned activist went on a “full hunger strike"’ on Tuesday and plans to stop drinking water on the first day of the global climate summit next week, his family said.

Alaa Abdel-Fattah, an outspoken dissident and a U.K. citizen, rose to prominence with the 2011 pro-democracy uprisings that swept the Middle East and in Egypt toppled long-time President Hosni Mubarak. The 40-year old activist spent most of the past decade behind bars and his detention has become a symbol of Egypt’s return to autocratic rule.

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