The UN political chief has called on Israel to ensure that urgently-needed humanitarian supplies for the Gaza Strip are not "held hostage to political and security developments". Undersecretary-General for Political Affairs Rosemary DiCarlo told the Security Council yesterday its meeting was taking place "in the wake of yet another series of violent escalations that threatened to plunge Gaza into war". She said the recurring violence "highlights the urgency" of UN and Egyptian-led efforts, along with regional and international partners, "to prevent another devastating outbreak of hostilities, respond to the most urgent humanitarian needs, and support intra-Palestinian reconciliation". DiCarlo said funding for UN emergency fuel to keep about 250 hospitals, water and sanitation facilities in Gaza operating at a minimum level "has now run out". She appealed for USD 4.5 million to keep these critical facilities operating through the end of the year. DiCarlo also expressed concern at "the dangerously short supply of essential medicines, with 40 per cent of essential drugs completely depleted". Israel and Egypt have imposed an economically-crippling blockade on Gaza since Hamas seized control of the coastal territory from the internationally-backed Palestinian Authority in 2007. Israel says the blockade is needed to contain Hamas, a militant group that seeks its destruction. While the closure has devastated Gaza's economy, it has failed to oust Hamas or loosen its grip on power. Since July, Israel and Hamas have engaged in three rounds of heavy fighting, with Hamas firing dozens of rockets into Israel and the Israeli military carrying out dozens of airstrikes in Gaza. DiCarlo said in recent weeks the humanitarian situation in Gaza had "deteriorated further, due in part to additional restrictions that Israel imposed on the movement of goods through the Kerem Shalom crossing" - the primary avenue for food, fuel, construction materials and aid to enter the beleaguered territory. Israel closed the crossing in response to the violence and Hamas' launching of incendiary kites and balloons that have burned thousands of acres of Israeli fields, forests and agricultural land. The crossing was reopened by Israel on August 15 when it also expanded the fishing zone off Gaza to nine nautical miles. "As we work towards a full lifting of the closures on Gaza.," DiCarlo said, "I call on all parties to ensure that urgently needed humanitarian supplies reach the Strip." She said violent incidents have also continued elsewhere in the Palestinian territories and in Israel. But, at the same time, DiCarlo cited tangible steps by ordinary Israelis and Palestinians "to promote tolerance and forge a shared future". As the international community focuses on resolving the crisis in Gaza and returning the legitimate Palestinian government to the strip, she said, the perseverance of this individuals is a reminder of the broader goal of achieving a two-state solution where Israelis and Palestinians live side by side in peace and security.