By Nidal al-Mughrabi and Maayan Lubell GAZA/JERUSALEM (Reuters) - Israel will extend a humanitarian truce in the Gaza Strip by a further four hours, a government source said on Saturday, as the number of Palestinian deaths in the 19-day war topped 1,000. It was not immediately clear if Hamas Islamists, who control the coastal enclave, were also willing to prolong the ceasefire, which was originally due to last just 12 hours. "It's all gone, our whole lives were in that house, home to 18 people!" screamed Zaneen, a small woman in a black robe and purple head scarf, as she wondered through the debris in the town of Beit Hanoun in the northern Gaza Strip. "My God, we want peace, peace and for all this to stop!" Israel's security cabinet was due to convene later on Saturday to discuss international efforts, being led by U.S, Secretary of State John Kerry in Paris, to secure a longer lasting truce.