Sky news:
Hamas's armed wing has said it will start executing an Israeli captive for every new civilian house bombed without warning.
The announcement was made by the spokesman of the Qassam Brigades in audio released Monday night.
Abu Obeida claimed the group had, until now, been acting in accordance with "Islamic instructions" by keeping the Israeli hostages safe.
However, he blamed the group's intended move to execute the hostages on Israel's stepping-up of air strikes on Gaza City.
"We have decided to put an end to this and we declare that any targeting of our people in their homes without prior warning will be regrettably faced with the execution of one of the hostages of civilians we are holding," he said.