helicopter carrying voting materials near the city of Benghazi in Libya was shot down on Friday, killing one election commissioner. A spokesman for the country's ruling council labeled the attackers as "enemies of the revolution." The attack comes on the eve of the country's first election since longtime dictator Moammar Gadhafi was overthrown and then killed last year. It's the latest incident reflecting escalating tensions in Libya leading up to the election. On Thursday, rebel fighters shut down three oil refineries and attacked the offices of the country's election commission, imploring the ruling council to cancel the election. The spokesman said the elections will still go on as planned, despite the rebel group's complaints that the distribution of seats among Libya's regions is unfair.