Hamas has swiftly reestablished its hold over areas from which Israel withdrew, killing dozens of Palestinians it accused of collaborating with Israel.

By Nidal al-Mughrabi and Alexander Cornwell CAIRO/JERUSALEM (Reuters) -Israeli forces killed three Palestinians in Gaza near the line demarcating areas of Israeli control on Monday, underlining the struggle to broaden a fragile ceasefire deal approved over six weeks ago to global acclaim.

US-backed Gaza aid group transitions work after proving more effective than U.N. agencies reportedly plagued by corruption and Hamas support in Gaza Strip.

Qatari mediators who helped put the cease-fire deal together are alarmed by the repeated fighting in Gaza and deadly airstrikes, which they warned could undo the already strained path to peace.

By joining a peacekeeping force, Jakarta could be seen as siding with the US and Israel in the Gaza conflict, analysts say.

Israel's military on Saturday said it launched airstrikes against Hamas terrorists in Gaza in the latest test of the ceasefire that began on Oct. 10. Health officials in Gaza reported at least 14 people killed and another 45 wounded, including children.

The U.S. is pushing ahead with plans to build communities for Palestinians on the Israeli side of the line dividing Gaza.

Egypt, Qatar, and the US have been mediating between Hamas and Israel, securing the ceasefire that came into effect last month.