Demonstrators take part in a rally in support of Palestinian prisoners on hunger strike in Israeli jails, in Gaza City April 17, 2017.

Demonstrators take part in a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank town of Bethlehem, April 26, 2017.

A Palestinian protester returns a tear-gas canister fired by Israeli troops during clashes following a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank city of Hebron, April 27, 2017.

Israeli border policemen detain a Palestinian protester during clashes at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank town of Bethlehem April 27, 2017.

Demonstrators hold pictures of jailed Palestinians during a rally in support of Palestinian prisoners on hunger strike in Israeli jails, in Gaza City April 17, 2017.

Israelis have a BBQ outside Ofer Prison while Palestinians rally in support of Palestinian prisoners on hunger strike in Israeli jails over the fence, outside Ofer Prison near the West Bank city of Ramallah April 20, 2017.

A Palestinian protester returns a tear gas canister fired by Israeli troops during clashes at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, near the Jewish settlement of Beit El, near the West Bank city of Ramallah April 27, 2017.

Medics tend to a female protester after inhaling tear gas fired by Israeli troops during clashes at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank town of Bethlehem April 27, 2017.

Demonstrators gather during a rally in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank city of Ramallah April 17, 2017.

Palestinian boys shout slogans during a rally in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank city of Nablus April 20, 2017. REUTERS/Abed Omar Qusini

Palestinian protesters run during clashes with Israeli troops at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, near the Jewish settlement of Beit El, near the West Bank city of Ramallah April 27, 2017.

A Palestinian protester argues with an Israeli border policeman during a protest in support of Palestinian prisoners on hunger strike in Israeli jails, near the Jewish settlement of Beit El, near the West Bank city of Ramallah April 23, 2017.

A Palestinian protester argues with an Israeli border policeman during a protest in support of Palestinian prisoners on hunger strike in Israeli jails, near the Jewish settlement of Beit El, near the West Bank city of Ramallah April 23, 2017.

A wounded Palestinian protester is evacuated during clashes with Israeli troops as they protest in support of Palestinian prisoners on hunger strike in Israeli jails, near the Jewish settlement of Beit El, near the West Bank city of Ramallah April 27, 2017.

A Palestinian protester gestures as he lies on the ground during clashes with Israeli troops at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank town of Bethlehem April 27, 2017.

Men play the role of jailed Palestinians and Israeli soldiers during a rally in support of Palestinian prisoners on hunger strike in Israeli jails, in Gaza City April 17, 2017.

Demonstrators hold pictures of jailed relatives during a protest in solidarity with Palestinian prisoners on hunger strike in Israeli jails, in East Jerusalem, April 27, 2017.

A wounded Palestinian protester is evacuated during clashes with Israeli troops at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, near the Jewish settlement of Beit El, near the West Bank city of Ramallah April 27, 2017.

Israeli border policemen detain a Palestinian protester during clashes at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank town of Bethlehem April 27, 2017.

An Israeli border policeman aims his weapon during clashes at a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank town of Bethlehem, April 26, 2017.

A Palestinian protester uses a sling to hurl stones towards Israeli troops during clashes following a protest in support of Palestinian prisoners on hunger strike in Israeli jails, in the West Bank city of Hebron, April 27, 2017.