"It again shows his complete disregard for international law and his willingness to attack humanitarian delivery efforts," he added.
Misurata, which has been under siege by Gaddafi loyalists for several weeks, has remained dependent for much of its food and supplies on the sea link with the rebel capital Benghazi.
NATO had assumed control of the US-led military operation in Libya a month ago, and since then, the alliance warplanes have conducted a total of 4,242 sorties and 1,766 strike sorties, besides a total of 19 NATO ships reportedly patrolling the central Mediterranean.
On Friday, Gaddafi's forces had crossed into neighbouring Tunisia for the first time and fought a gun battle with Tunisian troops.
Tunisia then summoned Libya's ambassador to protest against the attack.
"We summoned the Libyan envoy and gave him a strong protest ... because we won't tolerate any repetition of such violations ... Tunisian soil is a red line and no one is allowed to breach it," Tunisia Deputy Foreign Minister Radhouane Nouicer had said. (ANI)
