Two churches have been set on fire in the capital of Niger amid fresh protests against French magazine Charlie Hebdo’s cartoon depicting the Prophet Muhammad. Saturday’s protests began outside Niamey’s grand mosque with police using tear gas a day after at least four were killed in the second city of Zinder.The French embassy has warned its citizens to stay indoors. Last week, Islamist gunmen killed 12 people at the magazine’s Paris offices. Eight of them were journalists. Subsequent attacks in Paris killed another five people, four at a Jewish supermarket. The cover of the magazine’s latest edition, published after the attack, featured a cartoon of the Prophet Muhammad weeping while holding a sign saying “I am Charlie”. Seven million copies of the edition are being printed in view of extraordinary demand, distributors announced on Saturday. The magazine’s print run before the attack was 60,000. Protests against the magazine were also seen on Friday in Pakistan, where protests turned violent in Karachi, the Sudanese capital of Khartoum and the Algerian capital, Algiers. People in Somalia took to the streets on Saturday.