An improvised explosive device killed five soldiers on patrol in northern Burkina Faso on Wednesday.
According to a statement by the army command, the attack happened at around 3:00 pm local time when the soldiers were engaged in patrol duties near the town of Mentao, adding that one of the vehicles in the convoy set off the device.
Meanwhile, ground and air reinforcements have been sent to evacuate the victims and search the zone.
This attack is the latest in a series of attacks generally attributed to jihadists operating in the region.
A jihadist insurgency in neighbouring Mali spilt over into Burkina in 2015.
The armed groups are linked to Al-Qaeda and the so-called Islamic State.
More than 1,500 people have died in the attacks, which have forced at least 1.4 million people to flee their homes since 2015.
Most of the attacks have taken place in the north and east of the country, near the borders of Mali and Niger.