Tripoli decided to close the Ras Jedir crossing in early March, according to Tunisian officials, a decision thought to have been linked to the large number of vehicles loaded with cheap fuel arriving in Tunisia.
Libyan vehicles started arriving once again mid-afternoon today, after Tunisia's interior ministry stated earlier that the Libyan authorities had agreed to reopen the border post.
The interior ministers of the neighbouring nations were expected to meet in Tunis tomorrow to draw up "a series of measures" relating to the Ras Jedir crossing, it added.
The move ignited unrest in the nearby Tunisian town of Ben Guerdane, which depends on informal trade with Libya.
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Residents ransacked the local offices of Tunisia's main workers' union last week, after it failed to observe an indefinite strike called to demand the border post's reopening and to protest the lack of investment in the neglected southern region.
The World Bank said in December that 20 per cent of the active population in Ben Guerdane work in the contraband business, making it one of the area's largest employers, if not the largest.