Libyan forces loyal to the eastern-based commander, General Khalifa Haftar, have been clashing in the south of the country with rebels from neighbouring Chad, BBC News reports.
Gen Haftar’s self-styled Libyan National Army said it had carried out air strikes.
The rebels, from a group called the Front for Change and Concord in Chad, said their positions on the border between the two countries had been attacked.
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According to the rebel group, General Haftar’s forces were backed by French troops but France has denied these allegations.