West African countries on Friday demanded an immediate civilian transition in Mali and elections within 12 months as they considered sanctions after rebel troops toppled the country’s president and seized power.

The demands were spelt out after the new junta released ousted president Ibrahim Boubacar Keita, seized in the August 18 coup, but also apparently granted their new chief the powers of head of state.

The coup shocked Mali’s West African neighbours and ally France, heightening worries over instability in a country already struggling with an Islamist insurgency, ethnic violence and economic stagnation.