Hamas has launched an effort to accelerate missile production in the Gaza Strip. Israeli military sources said Hamas has used Israel's ceasefire pledge to rebuild its military capabilities. The sources said this includes production of the Kassam-class short-range missiles, anti-tank rockets and mines. At the same time, Hamas was said to have restored strongholds destroyed by Israel's military. The sources said the strongholds have included weapons factories and warehouses. "Hamas and other groups are preparing for another offensive," an Israeli military source said. "They are being encouraged and paid by Iran to stage provocations that would end the ceasefire."