The fate of two Israeli soldiers presumed killed during the 2014 Gaza war has resurfaced with an emotional appeal from one of their mothers and a mysterious letter.

The family of Oron Shaul -- pronounced dead by the Israeli army but whose body has never been recovered -- appealed for information on Sunday, after a letter purportedly written by the soldier was sent to the family.

A rocket fired by Palestinians in the Gaza Strip hit an open field in southern Israel on Monday morning, the Israeli army said in a statement.

"No injuries have been reported," it added.

Israeli forces shot and killed a Palestinian in the Gaza Strip on Friday during clashes along the border, the enclave's health ministry said.

Salame Abu Jamaa, 23, was shot in the head during a protest east of Khan Yunis, health ministry spokesman Ashraf al-Qudra said.

An Egyptian naval patrol shot and killed a Palestinian fisherman and wounded another Thursday off the coast near the border between Gaza and Egypt, a Gaza health ministry spokesman said.

The victim was identified as Faris Meqdad, 18, ministry spokesman Ashraf al-Qudra said. 

Israeli air raids have hit the Gaza Strip in response to a rocket fired from the Palestinian enclave that was intercepted by the Iron Dome missile defense system, officials said Wednesday.

There were no reports of injuries from both the rocket fire and the Israeli raids, which the military said targeted "four terror sites".

Muammar Quider was set to marry, but he reached his breaking point as he dealt with the unique pressures of life in the Gaza Strip.

The 21-year-old Palestinian recently tried to kill himself by swallowing rat poison.

Israeli Defense Minister Moshe Yaalon has warned that Israel will not tolerate advanced weapons reaching Hizbullah, which has fought alongside Syrian troops.

“Those who try to violate our sovereignty – we will strike them, and those who try to transfer advanced weapons to terror elements, with an emphasis on Hizbullah, we will strike them, and those who try to transfer chemical weapons to terror elements, we will strike them,” Yaalon said on Tuesday during a visit to Gaza-border communities.

Egyptian President Abdel Fattah al-Sisi on Saturday said the security measures taken by his country along the border with Gaza were not aimed at "harming" Palestinians.

"The measures taken by Egypt to secure its eastern borders are in full coordination with the Palestinian Authority and cannot have the aim of harming our Palestinian brothers in the Gaza Strip," Sisi was quoted as saying in a statement sent by his office.

Hamas on Thursday accused Egypt of further besieging the Gaza Strip by flooding the border area to the south of the Palestinian enclave, which is already under an Israeli blockade.

Egypt has been carrying out digging work in the area for several weeks that Palestinians believe is intended to flood the last remaining tunnels between Gaza and the Sinai, where jihadist fighters have been battling Egyptian forces.

Human Rights Watch on Tuesday accused Egypt's military of having "violated international law" through mass home demolitions and evictions over the past two years along its border with Gaza.

Egypt's army in October created a wide buffer zone in the border town of Rafah in the north of the Sinai Peninsula, where it says tunnels have allowed militants and weapons in from the Palestinian enclave.