US and Egyptian special forces have reportedly been offering covert armed training to rebel fighters in the battle for Libya, Al Jazeera has been told.
An unnamed rebel source related how he had undergone training in military techniques at a "secret facility" in eastern Libya.
He told our correspondent Laurence Lee, reporting from the rebel-stronghold of Benghazi, that he was sent to fire Katyusha rockets but was given a simple, unguided version of the rocket instead.
"He told us that on Thursday night a new shipment of Katyusha rockets had been sent into eastern Libya from Egypt. He didn't say they were sourced from Egypt, but that was their route through," our correspondent said.
"He said these were state-of-the-art, heat-seeking rockets and that they needed to be trained on how to use them, which was one of the things the American and Egyptian special forces were there to do."
The intriguing development has raised several uncomfortable questions, about Egypt's private involvement and what the arms embargo exactly means, said our correspondent.
"There is also the question of whether or not the outside world should arm the rebels, when in fact they [rebels] are already being armed covertly." Video and more.
