A round of violence on Sunday was short-lived, but analysts expect more tensions between Israel and Palestinian militants that will put the truce under strain.

An Israeli security official said the transfer of aid into the territory is halted "until further notice," the first major test of the ceasefire.

Israel has reopened two crossings in Gaza, while the key Rafah crossing will stay closed to the movement of people until further notice.

By Nidal al-Mughrabi and Steven Scheer CAIRO/JERUSALEM (Reuters) -Israeli fire killed three people near a ceasefire line in Gaza on Monday, medics said, with U.S. envoys expected in Israel to try to push forward the fragile truce that faced its gravest test so far over the weekend.

As the delicate ceasefire between Israel and Hamas takes hold, some aid has begun flowing into the Gaza Strip, where many Palestinians are returning home and beginning to reckon with the destruction caused by the two-year conflict.

Detainees seek to return to their normal lives in Gaza after being freed from Israeli captivity, where some say they faced torture and beatings.

Israel and Hamas say they are committed to the ceasefire after clashes over the weekend. And, lawmakers not feeling the pressures of the government shutdown.

Having transformed an Israeli attack on Qatari soil into diplomatic momentum for a ceasefire in Gaza, officials in Doha are forging ahead on other thorny conflicts, including the escalating tensions between the United States and Venezuela.