Anonymous Hamas officials claim Israeli agents posed as aid workers before their covers were ultimately blown.
Israeli forces deployed along the volatile border with the Gaza Strip are firing live rounds at rock-throwing Palestinian protesters.
Avigdor Lieberman claims the pact, which follows two days of heavy fighting, amounts to a "surrender to terrorism."
The fighting in Gaza casts doubt over recent understandings brokered by Egypt and U.N. officials to reduce tensions.
The Israeli military says 14,000 Palestinian protesters thronged border areas on Friday.
More than 100 are reported wounded by Israeli gunfire as thousands of Gazans gather along the border fence.
The shootings occur as thousands of Palestinians gather along the frontier in response to calls by Hamas.
Benjamin Netanyahu says Iran is keeping up to 300 tons of nuclear equipment and material in an unremarkable-looking property near a rug-cleaning operation.
In the last five months, three emergency workers treating wounded protesters have been killed by Israeli army fire, while dozens more have been hurt by live fire or tear gas.
Israeli Ambassador Danny Damon responds to Antonio Guterres' report by saying that "the only protection the Palestinian people need is from their own leadership."