Hamas militants distanced themselves on Friday from a ceasefire offer that the Palestinian government led by the Islamist group made to Israel.Differences over the truce offer—which was conditional on Israel halting military activity in Gaza and the West Bank—could point to disagreement between Hamas’s grassroots and the government over its tactics toward the Jewish state.‘‘We are not interested in making any offers or proposals. When the occupation stops its killings and crimes against our people then the factions may look into the issue in accordance with the interests of our people,’’ said Sami Abu Zuhri, Hamas’s official spokesman.Abu Zuhri said a ceasefire offer was announced by the cabinetspokesman on Thursday in an interview with Israel Radio represented only the government, and not the group.The Islamists formed the Palestinian government in March after winning parliamentary elections. Hamas members hold all key cabinet positions, including the Prime Minister’s portfolio.