Palestinian prisoners in Israeli jails have launched an open-ended mass hunger strike over deteriorating conditions inside. About 30 inmates started the strike on Sunday, and up to 1,500 others will join them in the coming week, the prisoners - including administrative detainees - said in a statement circulated by local media. The prisoners will reject the intake of any food or water, mainly in protest against the recent installation of mobile phone reception blocking equipment in the Ramon prison, a notorious Israeli military jail in the southern Negev region. This equipment is a health hazard that harms the prisoners and may lead to cancer, the prisoners said in their statement.