A delicate truce between Israel and Hamas hangs by a thread after Israel blocked humanitarian aid into Gaza, in response to Hamas rejecting a new Israeli proposal to extend the ceasefire without any commitment to end the war or fully withdraw troops.

A stabbing in the Israeli city of Haifa on Monday left one person and the attacker dead, authorities said, in the first such fatal attack since the Gaza ceasefire began in January.The attack came one day after Israel blocked aid to the Gaza Strip during an impasse over extending the truce in the Palestinian territory.

The move was apparently part of a bid to force Hamas into accepting a temporary extension of a cease-fire and releasing more hostages.