Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Relatives of 27-year-old Palestinian farmer Omar Samour, who was killed earlier in the day by Israeli tank fire, mourn at the morgue of a hospital in Khan Yunis in the southern Gaza strip on March 30, 2018. Local witnesses said Samour was working his land near the border when the shells hit, while an Israeli army spokesman reported that "two suspects approached the security fence along the southern Gaza Strip and began operating suspiciously. The shelling came just hours before the opening of large protest camps near the border, which have prompted the Israeli army to deploy reinforcements, including more than 100 special forces snipers, for fear of mass attempts to break through the security fence. Photo by Abed Rahim Khatib/ Flash90

Relatives of 27-year-old Palestinian farmer Omar Samour, who was killed earlier in the day by Israeli tank fire, mourn at the morgue of a hospital in Khan Yunis in the southern Gaza strip on March 30, 2018. Local witnesses said Samour was working his land near the border when the shells hit, while an Israeli army spokesman reported that "two suspects approached the security fence along the southern Gaza Strip and began operating suspiciously. The shelling came just hours before the opening of large protest camps near the border, which have prompted the Israeli army to deploy reinforcements, including more than 100 special forces snipers, for fear of mass attempts to break through the security fence. Photo by Abed Rahim Khatib/ Flash90

Relatives of 27-year-old Palestinian farmer Omar Samour, who was killed earlier in the day by Israeli tank fire, recite prayers as they stand above his body in the morgue of a hospital in Khan Yunis in the southern Gaza strip on March 30, 2018. Local witnesses said Samour was working his land near the border when the shells hit, while an Israeli army spokesman reported that "two suspects approached the security fence along the southern Gaza Strip and began operating suspiciously. The shelling came just hours before the opening of large protest camps near the border, which have prompted the Israeli army to deploy reinforcements, including more than 100 special forces snipers, for fear of mass attempts to break through the security fence. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate with crossed-out posters depicting Israeli Prime Minister Benjamin Netanyahu and US President Donald Trump, during a tent city protest near Khan Yunis in the southern Gaza Strip March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians play foorball near protest camps, near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90

Palestinians demonstrate near the border with Israel in Khan Yunis in the southern Gaza Strip, on March 30, 2018, commemorating Land Day. Land Day marks the killing of six Arab Israelis during 1976 demonstrations against Israeli confiscations of Arab land. Photo by Abed Rahim Khatib/ Flash90