At least 14 people were killed in an attack on a church in eastern Burkina Faso on Sunday, government said.
The identity of the gunmen was not immediately clear and further details had yet to emerge. Burkinabe armed forces were caring for the wounded and searching the area, government said in a statement.
This year an Islamist insurgency ignited ethnic and religious tensions in Burkina Faso, rendering large parts of the country ungovernable, especially in northern areas bordering Mali.
The attack in Hantoukoura near the Niger border in the Est region, is known for banditry over the past year from suspected jihadist groups with links to al Qaeda and Islamic State.
On November 6 gunmen opened fire on a convoy of buses carrying mine workers in Est region, killing 39.
The timing of the latest incident, during hours of worship, mirrored other attacks on Christians this year — a new phenomenon in a West African country that long prided itself on religious tolerance.