The governor of Nigeria's most populous state, Lagos, has announced a 24-hour curfew starting 16:00 local time.

Governor Babajide Sanwo-Olu said anti-police brutality protests in the city had turned violent after being infiltrated by criminals.

"As a government that is alive to its responsibility and has shown a commitment to the movement #ENDSARS, we will not watch and allow anarchy in our dear state," he said in a statement.

Under the terms of the curfew, "nobody except essential service providers and first responders must be found on the streets," the governor said.