British Prime Minister David Cameron and U.S. President Barack Obama vowed a united front against Islamic extremists following a series of attacks in France, in an article released Wednesday.

The joint editorial published on the eve of a visit by Cameron to Washington said security was necessary for economic strength and that the two countries would work together to combat terrorism.

The Senegalese government banned the dissemination of Wednesday's editions of the satirical French weekly Charlie Hebdo and the French daily Liberation, both of which put a cartoon of the Prophet Mohammed on their front pages.

"It is forbidden to distribute and disseminate, by any means, today's editions of the French magazine 'Charlie Hebdo' and the French newspaper 'Liberation' throughout the national territory," the Senegalese news agency APS reported, citing a statement from the interior ministry.

French President Francois Hollande proclaimed Wednesday that "Charlie Hebdo is alive and will live on," after the satirical weekly published its first edition since Islamist gunmen attacked its Paris offices and killed 12 people.

"You can murder men and women but you can never kill their ideas," Hollande said as the new edition, which controversially features a cartoon of the Prophet Mohammed on its cover, sold out across the country.

Four bookshops in Brussels have received letters warning of reprisals if they distribute the controversial first issue of French satirical weekly Charlie Hebdo since last week's attacks, Belgian authorities said.

Copies of the satirical magazine, featuring the Prophet Mohammed on its cover holding a "Je Suis Charlie" sign under the headline "All is forgiven", are due to go on sale in Belgium on Thursday.

Israeli-Argentinian conductor Daniel Barenboim, a tireless campaigner for peace between Israel and the Palestinians, said Wednesday "new paths" for peace are needed after last week's attacks in France.

Barenboim, 72, who is renowned for his attempts to make peace through music, added that the situation in the Middle East is "much worse" now than when he set up a "peace orchestra" known as the East-West Divan orchestra with Palestinian scholar Edward W. Said in 1999.

Hizbullah on Wednesday condemned as a “dangerous insult” the publication of new Prophet Mohammed cartoons by French satirical magazine Charlie Hebdo that was attacked by jihadists last week, describing the move as a “major provocation against the sentiments of more than 1.5 billion Muslims.”

In a statement, the party said the cartoons carried “an insult to the Prophet Mohammed, Islam, religions and the sanctities of humanity in general.”

French President Francois Hollande on Wednesday criticized the international community for the slow response to the conflict in Syria, in a speech to troops aboard the Charles De Gaulle aircraft carrier.

"I continue to regret the fact that the international community did not act in the required time to stop massacres in Syria and prevent extremists from gaining even more ground," he said.

A U.S. judge on Wednesday denied a request from the Boston bombings suspect to delay jury selection in his trial on the grounds that the Paris attacks could influence potential jurors.

Dzhokhar Tsarnaev's legal team filed the unusual motion at the U.S. district court in Boston more than a week after jury selection began. The court papers were published by U.S. media.

Images of Israel's premier elbowing his way to the front row of world leaders in Paris sparked both embarrassment and amusement back home -- providing rich pickings for opponents in the upcoming election.

Controversial French comedian Dieudonne was arrested Wednesday and will stand trial over a comment suggesting he sympathized with one of the Paris attackers, as France cracks down on those who condone terrorism.

The arrest was one of 54 cases for "condoning terrorism" or "making threats to carry out terrorist acts" opened since Islamist gunmen last week killed 17 people in a three-day shooting spree that targeted the satirical weekly Charlie Hebdo, police and a Jewish supermarket.