Mourners gather at a funeral at a mosque in Rafah, southern Gaza Strip, Tuesday, July 15, 2014 (Photo: AP)

Smoke rises after an Israeli missile strike in Gaza City, Tuesday, July 15, 2014 (Photo: AP)

A Palestinian woman walks past the remains of a house which police said was destroyed in an Israeli air strike in Gaza City July 15, 2014 (Photo: Reuters)

Palestinian Suma Abu Mahsen, 7, stands by a damaged wall of a house following an overnight Israeli missile strike to a nearby transition center for newly released convicts, that was not yet operational, in Rafah, southern Gaza Strip, Tuesday, July 15, 2014 (Photo: AP)

Children's belongings are seen on the floor of the el-Zatmah family home damaged by an overnight Israeli missile that struck the nearby transition center for newly released convicts, which was not yet operational and empty, in Rafah, southern Gaza Strip,Tuesday, July 15, 2014 (Photo: AP)

Palestinian boys stand in rubble at the site of the el-Zatmah family home which was damaged by an overnight Israeli missile that struck and destroyed the nearby transition center for newly released convicts, that was not yet operational and empty, in Rafah, southern Gaza Strip,Tuesday, July 15, 2014 (Photo: AP)

Israelis take cover on the side of a road as a siren sounds warning of incoming rockets outside the northern Gaza Strip July 15, 2014 (Photo: Reuters)

Israeli youths look at the Gaza Strip from a hilltop near the southern town of Sderot July 15, 2014 (Photo: Reuters)

Palestinian rescue men inspect the wreckage of a vehicle following an Israeli air strike, at the main road in Rafah, Tuesday, July 15, 2014 (Photo: AP)

A boy, who is hoping to cross into Egypt with his mother, sleeps as he waits at the Rafah crossing between Egypt and the southern Gaza Strip July 16, 2014 (Photo: Reuters)

Relatives weep as they hold the body of Sarah Omar el-Eid, 4, as the bodies of her father, Omar, 26, and her uncle, Jihad, 27, are brought into a house in Rafah, southern Gaza Strip, during their funeral, Tuesday, July 15, 2014 (Photo: AP)

Relatives of four-year-old Palestinian girl Sarah Sheik al-Eid, who medics said was killed with her father and uncle in an Israeli air strike on Monday, mourn during their funeral in Rafah in the southern Gaza Strip July 15, 2014 (Photo: Reuters)