Gazan authorities said Israeli forces shelled a shelter at a UN-run school, killing at least 15 people, as the Palestinian death toll in the conflict reached 808 and attempts at a truce remained elusive.
Ban Ki-moon underlined "the critical importance" of ending hostilities in the Gaza Strip, and strongly urged all sides to "avoid any further escalation at this time."
Monday marked the beginning of the three-day Eid al-Fitr holiday, which caps the Muslim fasting month of Ramadan.
Israel has embarked on " unlimited ceasefire" policy on Monday morning, after 21 days of raging conflict and mounting international pressure.
The UN Security Council issued an urgent appeal to Israel and Hamas early Monday for an immediate humanitarian ceasefire in Gaza.
A Palestinian was killed and ten injured on Sunday after Israeli war jets resumed airstrikes on Gaza, where a UN-proposed humanitarian ceasefire for 42 hours between Israel and Hamas collapsed.
Earlier humanitarian truce fell apart after rockets fired at southern Israel
Islamic Hamas movement announced on Sunday that it has agreed with the Palestinian factions to accept a UN-proposed ceasefire for 24 hours in the Gaza Strip.
Israel extended a humanitarian ceasefire in the Gaza Strip for another 24 hours, but Hamas, which dominates the coastal enclave, said it would only accept the truce if Israeli troops left the territory.
Israel has embarked on " unlimited ceasefire" policy on Monday morning, after 21 days of raging conflict and mounting international pressure.
The UN Security Council issued an urgent appeal to Israel and Hamas early Monday for an immediate humanitarian ceasefire in Gaza.
A Palestinian was killed and ten injured on Sunday after Israeli war jets resumed airstrikes on Gaza, where a UN-proposed humanitarian ceasefire for 42 hours between Israel and Hamas collapsed.