At least 37 civilians are dead and more than 60 are wounded after gunmen attacked a convoy of local employees working for the Canadian gold mining company Semafo in Burkina Faso on Wednesday.

Five buses and a military escort were ambushed approximately 40 kilometers (25 miles) from a gold mine in Boungou in the eastern part of the country.

Read more: Investigating DR Congo's illegal gold trade

Local sources said the attack began when an improvised explosive device struck a military vehicle in the convoy. Unidentified gunmen opened fire shortly after.

Deadliest attack in recent history

The convoy suffered "several fatalities and injuries", the company said in a statement, adding that operations at the mine were not affected. The death toll, which thus far does not include security personnel, is expected to mount. It is already the deadliest attack in nearly five years of violence in the country.

Governor of the Est region Saidou Sanou condemned the attack as "barbarous and cowardly"

Watch video 02:40 Share Training for combat in Burkina Faso Send Facebook google+ Whatsapp Tumblr linkedin stumble Digg reddit Newsvine Permalink https://p.dw.com/p/3EW3t Training for combat in Burkina Faso

Pattern of violence

It is the third such attack on the Montreal-based company, which runs two mines in the West African country, in the past 15 months. Vehicles on their way to the mines were victims of a similar deadly attack in August last year, while a police vehicle was targeted on the same road in December.

Jihadist violence has plagued Burkina Faso in recent years. The northern part of the country has served as a haven for Islamist extremists who cross the border from Mali. More than 630 people in the country have died in regular attacks that include raids on villages, road mines and suicide bombings. Past instances of violence have been claimed by various militant groups, like al-Qaeda and the "Islamic State."

Read more: Attacks in Burkina Faso — a simmering Islamist conflict

Until the Wednesday ambush, the country's deadliest attack had occurred at a hotel in the capital Ouagadougou in January 2016. Jihadists killed 30 people, about half of them foreign nationals.

The country is among the world's poorest nations, with poorly equipped security forces and a fragile political system that have been unable to rein in the violence.

Watch video 01:56 Share Jihadist attacks in Mali Send Facebook google+ Whatsapp Tumblr linkedin stumble Digg reddit Newsvine Permalink https://p.dw.com/p/3QhI9 Jihadist attacks on Malian army camps continue

kp/se (AFP, dpa, Reuters)

Every evening, DW sends out a selection of the day's news and features. Sign up here.