Israeli President Shimon Peres said on Wednesday that a United Nations investigation report is "outrageous," "not fair and one-sided," and his country will not apologize for attacking UN schools and other facilities during its military campaign in Gaza in January.

The Israeli government will "not accept one word" of the report, he told reporters after meeting with Secretary-General Ban Ki-moon. "We don't think we have the right to apologize because we have the right to defend the rights of our children and women."

The report, of which only a summary was made available to the public on Tuesday, concluded that Israel weaponry, including white phosphorous, was "the undisputed cause" of attacks on several schools, a health clinic and the UN's Gaza headquarters.

Ban told reporters on Tuesday that he would demand compensation for the damages, which exceed US$10.4 million. Peres said he has formed a group to handle such financial disputes but would not elaborate on the negotiations.

When questioned if Peres found the report's conclusions "outrageous," the president said he found it "outrageous" that the report made no mention of Hamas's attacks on Israel -- the reason for the "strong" counterattack in January.

"We did not hear of the 4,000 missiles" fired into Israel, he said. "What is the (UN) thinking, that Israel woke up one morning and decided to shoot?"

Peres admitted his government made mistakes during the three-week offensive, adding that even Israeli soldiers were killed by their own fire.

"A war is a mistake that produces mistakes," he said touching his hand to his chest.

In respect to the white phosphorous Peres said "It wasn't aimed against people. It was aimed to warn people," and reiterated that the government made 250,000 telephone calls to tell people to get out.

At one point, Peres was forced into a showdown with an Al-Jazeera reporter who asked how the president could explain that 900 civilians were killed in Gaza.

"How do I know that 1,200 Israelis were killed by Hamas?" Peres shouted back, wagging his finger. "Please explain to me. Why should they have been killed? Please explain to me."

"Three were killed during the war," retorted the reporter, referring to the number of Israeli casualties.

"Look you feel very strong," said Peres, gesturing vigorously with his hand. "Explain to me. Why did they fire -- Hamas?"

"I don't represent Hamas," the reporter coolly responded.

"Oh you don't know," said Peres, who then took a breath, clapped his hands and changed the subject to his meeting with US President Barak Obama in Washington D.C., which he called encouraging.