On a visit to Gaza Tuesday, U.N. Secretary-General Ban Ki-moon demanded a full investigation into the Israeli shelling of three U.N. buildings in the Gaza Strip.
The U.N. chief — a critic of many of Israel's recent actions — saw firsthand the destruction of three weeks of heavy fighting between Israel and Hamas.
During the offensive, Israeli shells struck the U.N. headquarters in Gaza as well as two U.N. schools. The attacks heavily damaged the headquarters and killed nearly 40 people near one of the schools.
Ban called the attacks "outrageous" and demanded a "full investigation" through proper judiciary systems. He also demanded guarantees it would never happen again.
Israel has said militants used the U.N. buildings as cover to launch attacks. But the military has launched its own investigation.
Palestinian officials in Ramallah said the fighting has cost Gaza almost $2 billion. Fourteen percent of all structures were damaged.
Amnesty International reported that traces of phosphorus were found in Israeli weapons in Gaza. International law prohibits using phosphorus in populated areas. The Israeli army said it is investigating that report as well.
Meanwhile, an Israeli defense spokesman said 190 trucks with food, medicine, fruits and vegetables were scheduled to enter Gaza Tuesday.
He said fuel would be transferred through another crossing.
From NPR reports with Linda Gradstein in Jerusalem and The Associated Press