Israeli Energy Minister Eli Cohen announced on Sunday that he had ordered an immediate halt to electricity supplies to the Gaza Strip.
"I have just signed an order to immediately cut off electricity supply to Gaza. We are using every tool at our disposal to ensure the release of all hostages and to guarantee that Hamas will not remain in Gaza the day after the war," Cohen said in a video address.
Last weekend, Israel declared that it would halt aid shipments to Gaza unless Palestinian militants agreed to its conditions for prolonging the ceasefire.
Hamas has criticized Israel's decision to stop the aid, accusing it of "committing the war crime of collective punishment" and claimed the action also affected Israeli hostages still in Gaza.
Israeli data indicates that 59 hostages are still held by Hamas, with approximately 24 thought to be alive.