By IRNA,
Gaza City : Israeli air strikes killed four Palestinians in the northern Gaza Strip.
Hamas said that Israel is violating the ceasefire.
Aid agencies say Gaza faces a humanitarian crisis if Israel’s blockade continues.
A spokesman for a small Palestinian group known as the Popular Resistance Committees (PRC) said that they will fire mortars into Israel in return for air raids on Gaza Strip.
Hamas and Israel are trading accusation and Israel escalated blockade on Gaza Strip.
At least 16 Gaza Palestinians have been killed in Israeli incursions into Gaza Strip in the past week.
United Nations Secretary-General Ban Ki-moon expressed concern over the extent humanitarian crisis in Gaza Strip and urged Israel to stop air raids and lift the blockade.
UN Relief Works Agency has shut down its operations “because Israeli blockade has made it unable to bring food and fuel supplies into Gaza”.
The humanitarian situation in Gaza Strip is deteriorating, UNRWA spokesman Christopher Gunness said.