UN secretary-general Antonio Guterres has deplored the deaths of three Palestinian children, according to a UN spokesman.

Iran Press/ America: UN secretary-General, Antonio  Guteres's spokesman, Stephane Dujarric has said: "The targeting of Palestinian children or exposing them to risk leading to violence is utterly unacceptable", according to ABCNews report.

Stephane Dujarric went on to say that the secretary-general "appeals to all to refrain from any act that could lead to further casualties, in particular any measures that could place children in harm's way."

Hundreds of Palestinians on Monday laid to rest three teenage boys martyred in an Israeli airstrike, with their families insisting they had no ties to any Palestinian resistance groups.  A crowd of mourners called on Gaza's resistance groups to retaliate for the brutal slaying of the teenagers.

Aisha Abu Daher said her 13-year-old son Abdel-Hamid had "nothing to do with resistance."

The three boys all lived in Wadi al-Salaqa, a farming village in central Gaza near the Israeli border.

The boys' bodies were wrapped in Palestinian flags and carried by mourners who fired shots into the air.

Egyptian mediators have been working to restore calm, and hope to bring about national reconciliation between the resistance group Hamas,  and the West Bank-based administration of President Mahmoud Abbas.

Medical personnel said they recovered the bodies of the teenagers 200 meters from Gaza's border fence. 

Gaza has been volatile for months as the Palestinian resistance group Hamas has led protests there demanding an end to a decade-old Israeli-Egyptian imposed blockade which has made life very difficult for the Palestinian population.

Also thousands gathered Monday on the beach for a protest against the blockade.The Gaza Health Ministry said a 27-year-old Palestinian was shot and martyred during the protest.

Hamas says the blockade must be lifted first and has vowed to continue the weekly protests, in which more than 200 Palestinians have been martyred since March.

Related news: 

Israeli forces martyr Palestinian youth in Gaza Strip

Omar Shakir, Human Rights Watch director for Middle East said, the killing of the boys appeared to be a violation of human rights law."Army or states can use lethal force only when there is an imminent threat to lives," he said. Entering a restricted area along the border, or even planting explosives there, "doesn't mean someone's life is at imminent threat," he said.

In the shadow of the UN's inefficiency and the silence of human rights advocates, the Israeli regime is continuing its crimes  against Palestinians. 

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