The 57-year-old woman was arrested in a joint operation with the Shin Bet, the internal security service. Documents, telephones and other evidence were found in her home linking her "to serious security breaches" Police have not released the name of Haniyeh's sister who was arrested.
The leader of the Hamas political bureau - according to the media - has two brothers and eight sisters. Three of these are married to Israeli Bedouins, therefore have Israeli citizenship and live in Tel Sheva, the Negev.