It did not apologize and warned civilians to "keep well clear of military personnel."

And to warn civilians about a twister, such a system "could light up the cellphones ahead of the tornado's path," he said.

U.S. planes also dropped about 200,000 leaflets warning civilians to stay in their homes.

Israel claimed to have warned civilians prior to a strike, and that firing was limited to open areas or military targets inside urban areas.

In the first days of the operation, Israel warned civilians to leave the south, sending about 400,000 refugees fleeing.

In a video sent to Al Jazeera, they warned civilians against boarding commercial flights.

Israel had warned civilians here and across much of southern Lebanon to flee or risk being caught up in its attacks.

The opposition warned civilians of a massacre by the government, unless the international community applied pressure.

At several instances, the IDF has also used a sound bomb to warn civilians before striking homes.

Israel's military used low-explosive missiles to warn civilians of imminent attack and to verify that buildings were evacuated before attacks.