Arrests take place in Umm al-Fahm, hometown of terrorists who killed two officers in Hadera, and in other Arab cities; official says wave of arrests to 'intensify' in coming days

Officials estimate some 20-30 sleeper cells loyal to jihadist group exist in Israel; Interior Minister Shaked said to look into stripping loyalists of their citizenship

Cousins swore allegiance to Islamic State before killing 2 officers in Hadera; one had been arrested in Turkey for trying to go to Syria to join jihadis; 5 arrested in Umm al-Fahm

Additional military and Border Police forces deployed to West Bank and Wadi Ara, as deadly shooting raises concern of further attacks inspired by Islamic State

Arab delegates at Negev Summit condemn attack, send condolences to victims and their families; Likud MK Barkat calls on armed citizens to help police and fight terrorists

Police say several officers hurt in attack near bus stop, restaurants in northern city; assailants said to be Arab Israelis

Zvi Gendelman accused of bribery, fraud and obstruction of justice for advancing interests of Sammy Levy, a real estate developer who backed his election campaign

Or Alefa was apparently knocked off breakwater where he was sitting with two friends; friend says he cried out, 'but we couldn't help him'

In 2nd day of operation, police, helicopters, navy vessel and volunteers comb the area for 18-year-old apparently knocked off breakwater where he was sitting with two friends

Police probing all avenues of investigation into the death of 44-year-old