CASABLANCA, Morocco — Four Moroccan truck drivers who were kidnapped in West Africa over the weekend were released in Niger.
The drivers were the latest victims of insecurity in the Sahel, an arid swath of land south of the Sahara where militant groups such as the Islamic State Sahel Province have exploited local grievances to expand their ranks and presence.
The four were transporting electrical equipment from Casablanca to Niamey, the capital of Niger, and had been on the road for more than 20 days along the 3,000-mile (5,000-kilometer) route when they were reported missing on Saturday, the secretary-general of Morocco's Transport Union said.
The Moroccan Embassy in Burkina Faso informed the union late Monday that the four drivers had been freed and were safe in Niamey.
''They will be brought back soon,'' said Echarki El Hachmi, the union's secretary-general. Their trucks and cargos remain missing, he said.
The drivers elected not to travel with a military escort on the route between northeastern Burkina Faso and western Niger. They went missing while traveling across the Burkinabe-Nigerien border, from the town of Dori to the town of Tera.
Truckers are discouraged from traveling the route without security escorts. El Hachmi said the drivers were taken by an unidentified armed group to a remote forest.
Moroccan authorities did not respond to questions about their efforts to free the drivers and whether their policy was to pay ransoms.