At least two Palestinians were killed and three more injured in an Israeli airstrike on the southern Gaza Strip town of Rafah.
Participating sides will continue work to bridge the remaining "real gaps" on some key issues in Iranian nuclear talks as the July 20 deadline approaches, US Secretary of State John Kerry says.
Egypt presented a five-point initiative for a ceasefire between Israel and Hamas in the Gaza Strip.
Egypt has proposed a ceasefire between Israel and Palestinian militants in Gaza that would start on Tuesday, ending a week of cross-border warfare, and be followed by talks to prevent further hostilities.
The use of the unmanned drone marked a new and unexpected tactic by Hamas as new Israeli airstrikes pushed the death toll from a weeklong Israeli offensive to at least 175.
Israel briefly deployed ground troops inside Gaza for the first time early Sunday as its military warned residents to evacuate, part of a widening offensive that has killed more than 160 Palestinians.
Afghanistan's two presidential candidates have agreed to a historic deal to audit all eight million votes cast in the disputed election after two days of intense shuttle diplomacy by top US diplomat John Kerry.
Rockets were fired at Israel from southern Lebanon on Monday, drawing retaliatory artillery fire from Israeli forces, in the third such rocket attack from Lebanon since Friday.
Israeli Prime Minister Benjamin Netanyahu rebuffed international calls for a ceasefire while defending his country's offensive in Gaza during appearances on US television on Sunday.
Israeli Navy commandos raided a facility in the northern Gaza Strip, from which the Islamist movement Hamas fired long-range rockets at Israeli cities, the Israel Defense Forces (IDF) said on Sunday.
Israel rushed an eighth missile interceptor battery into service on Saturday to counter stronger-than-expected rocket fire from Gaza as the military pounded positions in the Palestinian enclave for a fifth day, killing 19 people, medics said.
Growing tension between Israel and Hamas-led Gaza militants predominated the efforts to reach a ceasefire to end an intensive Israeli large-scale aerial offensive on the Gaza Strip.