"NATO deeply regrets accidental civilian casualties that were caused by this attack."

The operators need great proficiency with their weapons, and the ability to make split-second decisions in order to minimize accidental casualties.

The military services have taken steps to reduce the chances of accidental casualties.

Commanders say the aim is to integrate the new instruction into existing battle planning and training and increase awareness of preventing accidental casualties.

Paying more attention to these individual steps could reduce accidental casualties, Army commanders say.

We're going to make every possible attempt to avoid open battle or accidental casualties.

"Israeli children were really murdered; they were not accidental casualties," he said in a radio interview.

In the beginning, the RAF was forbidden to attack targets in Germany due to the risk of accidental civilian casualties.

Culture, however, was not an accidental casualty of war.

Within this ring base security forces could patrol and ambush freely, day and night, confident they would not become accidental casualties of friendly artillery fire.