"It is OUTRAGEOUS to shoot at children!" he wrote. How does the killing of a child in Gaza today help peace? "With further escalations expected during the coming weeks, the increasing numbers of injured patients requiring urgent medical care is likely to devastate Gaza's already weakened health system, placing even more lives at risk".
Over the weeks, Israel's use of lethal force has drawn worldwide condemnation.
Health officials said that two Palestinians were killed by army fire near the border Friday. His remarks Saturday arrived after a premier United Nations envoy at the region, Nikolay Mladenov, claimed it is "ridiculous to take at kiddies" and demanded a preliminary analysis.
Israel's use of live fire has drawn worldwide criticism but the Israeli government says it is protecting its borders and takes such action when protesters come too close to the border fence.
Israel says it has only opened fire when necessary to guard its border and prevent violence, but no Israelis have been wounded and its open-fire rules have come under scrutiny.
Overall, since the start of the events on 30 March, 37 Palestinians have been killed by Israeli forces in Gaza, 32 during the course of the demonstrations, including four children, and five in other circumstances. It did not provide details about the circumstances of Friday's shooting, which came as Palestinians were gathering for a fourth weekly mass protest on the border. He has blamed Hamas - the Islamist group which controls the strip - for the latest killings. Smaller groups advanced toward the fence, throwing stones, burning tires and flying kites with burning rags.
Al Jazeera's Bernard Smith, reporting from the protest, said the Palestinians seemed determined to edge closer to the border.
Israeli forces were using tear gas in addition to live fire. "Authorities required Palestinian spouses of Jerusalem residents to obtain a residency permit with reported delays of several years to obtain them".
The United Nations and the global community have condemned Israel's use of excessive force against the Palestinian civilian protesters, who did not fire one single bullet at the Israeli forces across the border.
The decision-which has compelled right-wing Israeli politicians to demand that her citizenship be revoked-was a notable departure for the actress, who, in a 2015 interview with The Hollywood Reporter, had criticized Israeli Prime Minister Benjamin Netanyahu, but also emphasized that she didn't want to use her platform to "shit on Israel".
Thousands of Gazans were gathered on Friday at various locations along the border in the blockaded enclave, calling for Palestinian refugees to be able to return to their former lands in what is now Israel. More than 700,000 Palestinians were expelled or fled during the 1948 war surrounding the creation of Israel.
Before Friday, 28 Palestinian protesters had been killed and hundreds wounded by Israeli army fire from across the border fence since the protests began in late March.