Suspected jihadists in Burkina Faso have killed 30 people in the north of the country, officials say.

Armed men targeted villages near the border with Niger on Wednesday, before opening fire on security forces who responded to the raids.

Eleven civilians are among the dead.

Burkina Faso's defence ministry said 10 of the attackers were also killed.

No group has admitted to being behind the violence, but Islamist militants are active in the area.