Dozens of Saudis have signed up to join a two-day hunger strike this week to protest against the detention of a prominent rights activist, a rights group said.
Mohammad Al Bajadi was detained in March 2011, activists said, for supporting families demonstrating outside the Interior Ministry in Riyadh to demand the release of detained relatives.
His trial, on charges including tarnishing the reputation of the state, has been suspended as he refused to recognise the court.
The Saudi Civil and Political Rights Association which is promoting the hunger strike on Thursday and Friday, said 38 activists had signed up on its website so far.