NATO acknowledged Friday that its airstrikes had hit rebels using tanks to fight government forces in eastern Libya, but said it would not apologize for the deaths because no one told them the rebels had tanks.
British Rear Adm. Russell Harding, the deputy commander of the NATO operation, said in the past, only forces loyal to Libyan strongman Moammar Gadhafi had used heavy armored vehicles.
Harding says the military situation between Libya's eastern coastal towns of Brega and Ajdabiya remains fluid, with the two sides engaged in a series of advances and retreats, making it difficult for pilots to distinguish between them.
NATO jets attacked a rebel convoy between these two towns Thursday, killing at least five fighters and destroying or damaging a number of armored vehicles.
The strikes, including an attack earlier this week, provoked angry denunciations of NATO by the rebels. At the same time, NATO officials have expressed frustration with the Libyan insurgents, who now view the alliance, whose mandate is limited to protecting civilians in Libya, as their proxy air force.
NATO last week took control over the international airstrikes that began March 19 as a U.S.-led mission. The airstrikes thwarted Gadhafi's efforts to crush the rebellion in the North African nation he has ruled for more than four decades, but the rebels remain outnumbered and outgunned and have had difficulty pushing into government-held territory even with air support.
Harding said Friday that NATO jets had conducted 318 sorties and struck 23 targets across Libya in the past 48 hours. They have flown over 1,500 sorties in the eight days since the alliance assumed overall command from a U.S.-led force.
NATO's jets have destroyed Gadhafi's anti-aircraft missile defenses, T-72 tanks and ammunition dumps, Harding said. The attacks also targeted Gadhafi's loyalist forces in the besieged city of Misrata, where rebels continue to hold out.
But Gadhafi's forces still pose a danger for the warplanes. They retain radars and surface-to-air missiles, as well as automatic cannons and shoulder-launched missiles that can hit planes at altitudes up to 5,000 meters (15,000 feet).
"It would appear that two of our strikes yesterday may have resulted in (rebel) deaths," he told reporters in Naples, where the alliance's operational center is located.
"I am not apologizing," Harding said. "The situation on the ground was and remains extremely fluid, and until yesterday we did not have information that (rebel) forces are using tanks."
Over the past week, Gadhafi's forces had switched tactics by leaving their heavy armor behind and using only light trucks armed with heavy machine guns and fast-firing anti-aircraft cannons on the front lines between Brega and Ajdabiya. These have proven very effective in disrupting repeated rebel attempts to push west toward Tripoli, but Gadhafi's forces have not been able to drive the rebels back toward Benghazi or establish a solid front line in that sector.
"These trucks cannot hold ground," Harding said. "When you see their tanks coming up, those are the vehicles that can cause the greatest harm to civilians."
On Thursday, the situation in that sector "was very confusing, vehicles going back and forth," he said.