A Palestinian protester throws a molotov cocktail towards Israeli security forces during clashes outside Ofer prison near the West Bank city of Ramallah April 17, 2012. The clashes broke out during a rally marking Palestinian Prisoners Day. At least 1,200 Palestinian prisoners in Israeli jails launched an open-ended hunger strike on Tuesday, upping the stakes in a protest movement that has put the Jewish state under pressure. REUTERS/Mohamad Torokman (WEST BANK - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)