On 1 May, rebels claimed that NATO aircraft hit and destroyed 45 loyalist vehicles while the government military convoy was leaving Jalu. However, NATO made no mention of the convoy destruction during its daily operational update for 1 May, and no NATO or independent confirmation of the claim or the attack was established. On 6 May, loyalist forces attacked a rebel checkpoint between Jalu and Kufra, killing six rebel fighters. The next day, loyalists conducted a hit-and-run attack against Jalu and the smaller oasis town of Ojla. The rebels also claimed to have re-taken Kufra, but loyalist forces were still in the surrounding area. On 25 May, rebel forces attacked government troops near Kufra, destroying a weapons-laden vehicle. They claimed that the loyalist force was composed of Sudanese mercenaries. On 12 June, the last loyalist raid against rebel positions occurred when a force of government troops attacked the Mislah and Sarir oil fields. On 1 July, "The Daily Telegraph" reported that, mid-June, a Sudanese military force crossed the Libyan border and took control of Kufra and the nearby military base. They had also surrounded the oil fields, but did not appear to be disrupting efforts to resume oil production. Still, the oil fields had suffered extensive damage due to loyalist raids and time was needed to repair them. The fate of the rebel contingent in Kufra was unknown. Sudan later denied any military involvement in Libya. By 27 June, it was reported loyalist forces were still holding strategic points near Kufra. In July 2011, National Liberation Army brigades out of Kufra reportedly seized control of much of Murzuq District in the Fezzan and threatened to march on Sabha.