Rasid.com, an opposition Shi'ite web site blocked by the Saudi authorities, said the seven died after setting fire to mattresses inside cells to protest against conditions at the al-Ahsa prison in the Eastern Province late on Sunday.
Citing medical sources, it said dozens were hospitalised.
Saudi prisons chief Ali al-Harithy was quoted by the official news agency SPA as saying the seven died "because of a dispute between some of them".
He said three security officers and 9 other prisoners had been taken to hospital. The identities of the dead and the reasons for their incarceration were not known.
Last Mod: 05 Mayıs 2008, 17:14