Reports from Burkina Faso say at least 13 security personnel were killed in an ambush by gunmen on Sunday.
The attack took place near Taparko, a town frequently targeted by Islamist militants.
Earlier in the day, a bus hit a landmine near the town, killing two people.
Burkina Faso’s military government has said its priority is to tackle a jihadist insurgency.
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Algeria president bans export of food

Algeria’s President Abdelmadjid Tebboune has banned the export of foodstuffs that the country imports, the state news agency has said.
The commodities include sugar, oil, pasta, semolina and wheat derivatives.
A source is quoted by the agency as saying that the president called it economic sabotage to sell commodities that the country does not produce locally.
The president’s decision also bans importation of frozen meat products, agency said.
President Tebboune made the announcement after listening to a presentation by trade and agriculture ministers on the availability for food staples.
Local media outlets have warned of increasing food prices.
Algeria imports most of its foodstuff. There have been protests in the past over increase in food prices in the country.
Nigerian officer probed over colleague’s assault
A senior Nigerian police officer is being investigated over the assault of a female colleague in Enugu state.
Oluseyi Okenla, who is the assistant commissioner in the state, faces possible sanctions if found culpable.
He is accused of dragging a female officer on the ground while beating her up and ordering her detention.
The senior officer has not commented about the allegations.
Enugu State Commissioner of Police Abubakar Lawal said “no stone would be left unturned” in the probe.
Police in Nigeria have in the past been accused of brutalising civilians.
The government had promised reforms after nationwide protests rocked the country for two weeks in 2020.
Source: BBC