A court in Saudi Arabia has sentenced a prominent Shia cleric to death, his brother has said on Twitter.
Sheikh Nimr Baqir al-Nimr went on trial in Riyadh last year after being accused by prosecutors of "sowing discord" and "undermining national unity".
The cleric was a vocal supporter of the mass anti-government protests that erupted in Eastern Province in 2011. His arrest two years ago, during which he was shot and wounded by police, triggered days of deadly unrest.
Oil-rich Eastern Province is home to a Shia majority that has long complained of marginalisation at the hands of the Sunni royal family.
Protests began there in February 2011 after the start of the pro-democracy uprising in neighbouring Bahrain, which has a Shia majority and a Sunni royal family. The Saudi authorities deny discriminating against Shia and blame Iran for stirring up discontent.