A Hamas military court in the Gaza Strip on Thursday sentenced a Palestinian to be hanged to death after he was found guilty of collaborating with Israel, a court source said.

The defendant, identified only by his initials A.S., was "sentenced to death by hanging after being convicted of collaborating with the occupation," the source said. 

The Palestinian Islamist movement Hamas warned Wednesday of renewed violence unless Israel lifts its blockade of Gaza, at a ceremony marking the end of a military-style summer camp for 25,000 Gazans.

"Today, our message to the occupier is very clear: We will not accept a blockade," said Mahmud Zahar, a senior leader of Hamas which rules the Gaza Strip and has been holding indirect contacts with Israel over a long-term truce in return for an end to the nine-year-old blockade.

In a West Bank hill village where an 18-month-old Palestinian child burned to death last week in a firebombing by suspected Jewish settlers, the boy's uncle fears for his own children's safety.

"They are still young; they don't understand anything yet, but they are already very scared because they saw their cousin being burnt," Hassan Dawabsha said in front of his brother's gutted home in Duma, nestled in the hills near the Jordan Valley.

Israel has intensified its pursuit of Jewish extremists in the wake of the firebombing death of a Palestinian child, detaining one suspect without trial through a controversial procedure usually invoked for Palestinians.

Police have arrested three alleged extremists this week, as pressure mounts to act against those responsible, though none of the suspects have been publicly accused of direct involvement in the firebombing in the West Bank village of Duma.

President Barack Obama has warned that any possible rejection by the Congress of the Iran nuclear deal, would force the U.S. to attack Iran, a move that could lead to a Hizbulalh retaliation against Israel.

"It would be destructive both to the U.S. and to Israel," Obama told Jewish leaders on Tuesday, according to Israeli media reports.

Israel's Defense Minister Moshe Yaalon Tuesday signed the first "administrative detention" order for a suspected Jewish extremist following the firebombing of a Palestinian home in which a baby was burned alive.

The subject of the order is Mordechai Meir, an Israeli settler arrested on Tuesday for "his involvement in violent activities and terrorist attacks in recent times," a statement said.

Israeli Prime Minister Benjamin Netanyahu hit out at "disinformation" from supporters of the Iran nuclear deal Tuesday, personally calling on U.S. Jewish groups to thwart the White House-backed agreement.

In a webcast hosted by Jewish American groups and broadcast to 10,000 people, Netanyahu hit out at unnamed opponents who misrepresented the deal and Israel's stance against it.

An Israeli court Tuesday ordered the head of a Jewish extremist group to remain in custody after his arrest following the burning to death of a Palestinian baby, judicial sources said.

The court in Nazareth in northern Israel extended Meir Ettinger's detention until at least Sunday, the sources said.

A French Christian tourist was assaulted by four Palestinians on Tuesday after waving an Israeli flag at the Al-Aqsa mosque compound in Jerusalem, one of Islam's holiest sites, police said.

The man, in his mid-thirties, was lightly wounded to the head and taken for medical care, a police spokeswoman said. He was detained and was facing potential charges of disrupting the public order.

A Jewish extremist group's leader was arrested Monday after a Palestinian baby died in a West Bank firebombing, as police investigated online threats against Israel's president for condemning "Jewish terrorism."

The domestic intelligence service named him as Meir Ettinger, a grandson of Meir Kahane, a rabbi who founded the racist anti-Arab movement Kach and was assassinated in 1990 in New York.