The Israeli military ordered a criminal inquiry Thursday into its own soldiers' reports that some troops killed Palestinian civilians, including children, during the Gaza war by hastily opening fire, confident that relaxed rules of engagement would protect them.

Their accounts, published in a military institute's newsletter, echo Palestinian allegations and feed into human rights groups' contentions that Israel violated the laws of war.

Soldiers also reported the wanton destruction of civilian property.

The troops spoke at a get-together with students enrolled in a military preparatory course. The transcript of the session appeared this week in a newsletter the institute publishes, Israeli newspapers reported.

Revelations shocked course leader

The head of the course, Danny Zamir, told the Haaretz daily newspaper he was "shocked" and relayed the reports to Israeli military chief Lt.-Gen. Gabi Ashkenazi because he feared serious ethical lapses among troops.

The military said it was not aware of the reported incidents but that its top lawyer has ordered military police to investigate.

Speaking to Israel Radio, Defence Minister Ehud Barak said Israel "has the most ethical army in the world" and reports of exceptions would be "checked carefully."

Haaretz and the Maariv newspaper reported that one published account said an Israeli sniper killed a Palestinian woman and her two children after they misunderstood another soldier's order and turned the wrong way.

The sniper was not told the civilians had been released from the house where they were confined and, in compliance with standing orders, opened fire when they approached him.

In another account given at the military institute, an elderly woman was shot dead while walking on a road, even though she was close enough for the soldiers to see whether she posed a threat, Maariv said.

Haaretz said the woman was shot from 100 metres away.

'Lives of Palestinians … less important'

"The climate in general, from what I understood from most of my men whom I talked to, was … the lives of Palestinians, let's say, are far less important than the lives of our soldiers. So as far as they're concerned, they can justify it that way," an infantry squad leader was quoted as saying.

However, Gur Rosenblatt, 35, a reserve infantry major who said he took part in fighting all over Gaza during the offensive, told the Associated Press he witnessed no wrongdoing.

Risked our lives to protect civilians: Major

"I was with my soldiers in the thick of the fighting and there was absolutely no incident where soldiers purposely hurt civilians or damaged their property," he said.

"In fact, we risked our own lives in order to protect civilians and their property. Even when Palestinians had rigged buildings with explosives or attacked us from homes, we did our best not to harm civilians."

Heavy civilian casualties and widespread destruction during Israel's three-week offensive into the Gaza Strip provoked international outcry against Israel, which halted its fire on Jan. 18.

A Palestinian human rights group says it has the names of 1,417 Gazans killed in the offensive. The Palestinian Centre for Human Rights said Thursday that of those killed, 926 were civilians, 236 were combatants and 255 were members of the Palestinian security forces.

Israel says the toll published by the Palestinians is inflated, but has acknowledged loosening its rules of engagement in Gaza to minimize military casualties.

Troops operating in densely populated areas, for example, were supported with heavy tank and artillery fire that sometimes flattened entire neighbourhoods.

Rights groups have accused Israel of using disproportionate force and failing to protect civilians. Cases they cite include the use of white phosphorus ammunition and shelling near a UN school that killed 42 people who had sought sanctuary there.

White phosphorus can be employed legitimately in battle, but rights groups say its use over populated areas can indiscriminately burn civilians and constitutes a war crime.

Yaakov Amidror, a former chief of Israel's military academies, told Army Radio that in combat, not all situations are clear cut, and if it comes down to a choice between soldiers being killed or killing others, "you must make a very cold choice and kill the other side."

But "if you see a woman and two children in the crosshairs, it's pretty clear —there is almost no case in the world that would justify pulling the trigger," Amidror said.

Wanton destruction of Palestinian property

Soldiers quoted in the transcript reported wholesale destruction of Palestinian property.

"We would throw everything out of the windows to make room and order," Maariv quoted a soldier as saying. "Everything in the house was tossed out the windows: Refrigerators, plates, furniture. The order was to throw all of the house's contents outside."

Troops felt they could write "Death to the Arabs" on the walls of private homes and spit on family pictures "just because you can," another soldier said.

"I think this is the main thing: to understand how much the army's ethics have sunk, really," Haaretz quoted him as saying.