text:  The Hamas chief, Ismail Haniyeh, has said Israel's most recent military offensive in Gaza City could push the ceasefire talks, due to resume in Qatar this week, back to square one. The group's telegram channels, as Mr Haniyeh told the mediators, he held the Israeli Prime Minister, Benjamin Netanyahu, fully responsible for a possible collapse of the negotiations. Mr Netanyahu has said that any ceasefire deal must allow Israel to resume fighting afterwards.