The top official in Libya’s air forces has announced he’ll back an offensive by a renegade general against Islamic extremists and militias blamed for wave of killings since the downfall of dictator Moammar Gadhafi. Col. Gomaa al-Abbani’s announcement late Tuesday is among a series of loyalty pledges made by military units and commanders to Gen. Khalifa Hifter. Militias allied to Hifter launched an attack Sunday against parliament after an offensive his forces led on Friday in the eastern city of Benghazi. Hours after al-Abbani’s announcement, witnesses said rockets targeted military camps in the capital, Tripoli. On Tuesday, Libya’s election commission announced parliamentary elections will be held June 25, a top demand among most Libyans.