A number of people taking part in a protest against police brutality have reportedly been shot dead or injured in Nigeria’s biggest city, Lagos.
A witness told the BBC he had counted about 20 bodies and at least 50 injured after soldiers opened fire. Amnesty International said it had obtained credible reports of deaths.
The authorities have promised an investigation into the shooting.
An indefinite 24-hour curfew has been imposed on Lagos and other regions.
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Protests over a now-disbanded police unit, the Special Anti-Robbery Squad (Sars), have been continuing for two weeks.
Reacting to the shootings in Lagos, former US Secretary of State Hillary Clinton called on Nigerian President Muhammadu Buhari and the army “to stop killing young #EndSARS protesters”.
Nigerian footballer Odion Jude Ighalo, who plays for Manchester United, accused the Nigerian government of killing its own citizens. “I’m ashamed of this government,” he said in a video posted on Twitter.