UK officials insist the crash was not caused by enemy action.
America said this heavy bombing phase of the war would continue, and US forces planned to drop more than 1,500 bombs and missiles in Iraq as part of the campaign.
There are also reports that as many as 8,000 Iraqi troops have surrendered to US forces near Basra, the second largest city in Iraq. They're said to be members of Iraq's 51st Infantry Division.
But Iraqi officials have denied this.