UPDATE 7-Cartoons in French weekly fuel Mohammad furore

* Cartoons portray Prophet naked, mock furore over film

* French government criticises publication, boosts security

* Arab League says protests should be peaceful

* Security increased outside magazine's offices

PARIS, Sept 19 (Reuters) - A French magazine ridiculed the

Prophet Mohammad on Wednesday by portraying him naked in

cartoons, threatening to fuel the anger of Muslims around the

world who are already incensed by a California-made video

depicting him as a lecherous fool.

The drawings in the satirical weekly Charlie Hebdo risked

exacerbating a crisis that has seen the storming of U.S. and

other Western embassies, the killing of the U.S. ambassador to

Libya and a deadly suicide bombing in Afghanistan.

Riot police were deployed to protect the paper's Paris

offices after the issue hit news stands.

It featured several caricatures of the Prophet showing him

naked in what the publishers said was an attempt to poke fun at

the furore over the film. One, entitled "Mohammad: a star is

born", depicted a bearded figure crouching over to display his

buttocks and genitals.

The French government, which had urged the weekly not to

print the cartoons, said it was shutting embassies and schools

in 20 countries as a precaution on Friday, when protests

sometimes break out after Muslim prayers.

Arab League Secretary-General Nabil Elaraby called the

drawings outrageous but said those who were offended by them

should "use peaceful means to express their firm rejection".

Tunisia's ruling Islamist party, Ennahda, condemned what it

called an act of "aggression" against Mohammad but urged Muslims

not to fall into a trap intended to "derail the Arab Spring and

turn it into a conflict with the West".

In the northern Paris suburb of Sarcelles, one person was

slightly hurt when two masked men threw a small explosive device

through the window of a kosher supermarket. Police said it was

too early to link the incident to the cartoons. One small local

Muslim group filed a legal complaint against the weekly but

there were no reports of reaction on the streets of France.

The posting on YouTube of a crude video, made in the United

States and available on YouTube since July, that mocked Mohammad

as a womanising buffoon has sparked protests in many countries,

some of them deadly.

The U.S. envoy to Libya and three other Americans were

killed in an attack in Benghazi, and U.S. and other foreign

embassies were attacked in cities in Asia, Africa and the Middle

East by furious Muslims.

Matthew Olsen, director of the U.S. government's National

Counterterrorism Center, branded the Benghazi assault a

"terrorist attack" and said officials were examining the

possibility that individuals involved in the attack may have

links to al Qaeda, and particularly the affiliate group al Qaeda

in the Islamic Maghreb.

INTERNATIONAL DEBATE

The furore has emerged as an issue in the U.S. presidential

election campaign and sparked international debate over free

speech, religion and the right to offend. Many Muslims consider

any representation of Allah or the Prophet Mohammad blasphemous.

In Los Angeles, an actress who appeared in the video filed a

lawsuit against a Coptic Christian man linked to the film,

Nakoula Basseley Nakoula, accusing him of fraud and slander and

asking that the film's trailer be removed from the Internet.

It was the first known civil lawsuit connected to the film

that has circulated online as a 13-minute trailer, including

under the title "Innocence of Muslims."

The actress, Cindy Lee Garcia, also named Google Inc

and its YouTube unit as defendants. Garcia's lawsuit

stated that she thought she was appearing in a desert adventure

film, not a "hateful" production about the Muslim prophet.

The United States has condemned the content of the video

while defending the right to free speech, and took a similar

line on the French cartoons.

"We know that these images will be deeply offensive to many

and have the potential to be inflammatory. But we've spoken

repeatedly about the importance of upholding the freedom of

expression that is enshrined in our constitution," White House

spokesman Jay Carney told reporters.

"In other words, we don't question the right of something

like this to be published, we just question the judgment behind

the decision to publish it."

In the Lebanese city of Sidon, around 10,000 people joined a

march organised by the Shi'ite group Hezbollah to protest

against the film and the cartoons, shouting "Enough

humiliation!" and "Death to America! Death to Israel!".

In Egypt, Essam Erian, acting head of the Muslim

Brotherhood's Freedom and Justice Party, told Reuters: "We

reject and condemn the French cartoons that dishonour the

Prophet and we condemn any action that defames the sacred

according to people's beliefs."

At the same time, rights groups demanded the release of a

Coptic Christian computer science graduate who they said had

been beaten up and arrested in Cairo on suspicion of re-posting

the anti-Islam video online.

In France, a joint statement by Catholic bishop Michel

Dubost and Mohammed Moussaoui, president of the French Muslim

Council, defended the right to freedom of expression under the

cherished French principles of "Liberty, Equality, Fraternity".

"But freedom endangers itself if it forgets fraternity and

respect for everyone's equal right to dignity," they added.

French Foreign Minister Laurent Fabius called the

publication of the cartoons a provocation.

"We saw what happened last week in Libya and in other

countries such as Afghanistan," he told a regular news

conference. "We have to call on all to behave responsibly."

CALL FOR CAUTION

France's ambassador to Iran sent French citizens there a

message urging them to exercise great caution, especially on

Friday, and around diplomatic missions and places of worship.

But Charlie Hebdo's editor, Stephane Charbonnier, rejected

the criticism. "We have the impression that it's officially

allowed for Charlie Hebdo to attack the Catholic far-right but

we cannot poke fun at fundamental Islamists," he said.

"It shows the climate. Everyone is driven by fear, and that

is exactly what this small handful of extremists who do not

represent anyone want: to make everyone afraid, to shut us all

in a cave," he told Reuters.

One cartoon alluded to the scandal over a French magazine's

publication of topless photos of the wife of Britain's Prince

William. It showed a bare female torso topped by a beard with

the caption "Riots in Arab countries after photos of Mrs

Mohammad are published".

Charlie Hebdo is no stranger to controversy. Its Paris

offices were firebombed last November after it published a

mocking caricature of Mohammad, and Charbonnier has been under

police guard ever since.

Speaking outside his offices in an eastern neighbourhood

with many residents of North African origin, Charbonnier said he

had not received any threats over the latest cartoons. In a

message on its Twitter account, Charlie Hebdo said its website

had been hacked, but referred readers to a blog it also uses.

In 2005, Danish cartoons of the Prophet sparked a wave of

protests across the Muslim world in which at least 50 died.

France is already on alert for attacks by al Qaeda on French

interests in West Africa.

A diplomatic source said this week that Paris had recently

foiled attacks on economic and diplomatic targets and had

credible evidence that more were planned.

"Al Qaeda in the Islamic Maghreb is a direct and immediate

threat," the source said.