A violent mob set light to at least seven churches in Niger during fresh protests against Charlie Hebdo magazine.
The mob rampaged through Niger's capital Niamey as anger mounted in several Muslim countries over the satirical magazine's depiction of the prophet Mohammed.
Around 1,000 youths wielding iron bars, clubs and axes stormed through the city, hurling rocks at police who responded with tear gas.
The French embassy in Niamey urged its citizens to stay at home.
Yesterday, a rally against Charlie Hebdo in the country's second city of Zinder left four dead and 45 injured.
Some 15,000 people also rallied in Russia's Muslim North Caucasus region of Ingushetia against Charlie Hebdo, which depicted on its most recent cover a weeping prophet holding a "Je suis Charlie" sign.
With France still reeling from last week's deadly attacks that killed 17 people, countries across Europe have stepped up security.
Meanwhile, it's been reported that four people have been arrested in Greece in connection with an alleged terror plot in Belgium.
Last week police shot dead two suspects in the town of Verviers who were plotting to murder police officers in the street.
Soldiers are patrolling the streets of Belgium for the first time in 35 years.
