Security tightened at Eiffel Tower, Champs-Elysees

PARIS -- Thousands of Parisian police guarded the Eiffel Tower, the Champs-Elysees and train stations on Saturday, as part of emergency measures enacted in response to text messages and Internet postings that called for "violent actions" in the capital.

In Lyon, France's third largest city, police fired tear gas to disperse stone-hurling youths at the historic Place Bellecour. It was the first time in 17 days of unrest that youths clashed with police in a major city.

Curfew in effect

Hours earlier, authorities had announced a weekend curfew in Lyon, barring youths under 18 from being outside without adult supervision between 10 p.m. and 6 a.m.

The emergency measures in Paris came a day after cell phone text messages and Internet blog postings called for "violent actions" in Paris on Saturday evening. Authorities banned public gatherings considered risky in an effort to keep the unrest from reaching inside the capital.

"This is not a rumor," National Police Chief Michel Gaudin said. "One can easily imagine the places where we must be highly vigilant."

No trouble was reported in Paris several hours after nightfall.

Rioting has weakened in intensity since the government declared a state of emergency Tuesday, empowering regions to impose curfews and conduct house searches.

The violence started in the Parisian suburb of Clichy-sous-Bois on Oct. 27 when about 100 youths rioted to protest the accidental deaths of two Muslim teens who were electrocuted while hiding from police in an electricity substation.

The turmoil, marked by arson and clashes with police, quickly spread across France in housing projects plagued by unemployment and alienation. The unrest has forced France to confront its failure to integrate minorities and the anger simmering among its large African and Arab communities.

Some 40 towns, suburbs and small cities have imposed curfews on minors.

Paris police banned public gatherings that could "provoke or encourage disorder" from 10 a.m. Saturday to 8 a.m. today. It was the first such ban in the French capital in at least a decade, said police spokesman Hugo Mahboubi.

Calls for peace and political change mounted.

Several hundred people demonstrated against the state of emergency in Paris' Latin Quarter, a gathering that police allowed because it was not deemed risky. Under tight police surveillance, the protesters called the new security measures a "provocation" that would not resolve the social and economic problems underlying the unrest.

The protesters, many from left-wing political groups and Communist-backed unions, called for the resignation of Interior Minister Nicolas Sarkozy, who has been accused of inflaming the violence by calling troublemakers "scum."

A similar rally in the southern city of Toulouse drew about 700 people.

Fires still burning

In Blangnac, on the outskirts of Toulouse, arsonists set fire to an electronics store on Saturday night, the regional government said. No injuries were reported.

Late Friday, two gasoline bombs slightly damaged a mosque in the southern city of Carpentras, a city grimly remembered for a 1990 neo-Nazi attack on a Jewish cemetery that sparked national outrage.

It was not immediately clear whether the attack was linked to the unrest. President Jacques Chirac called on investigators to find the perpetrators.

Police said unrest had largely subsided in Paris suburbs, where 86 vehicles were burned overnight.

A total of 502 vehicles were torched nationwide, slightly higher than the previous night, but a significant drop from a peak in the mayhem a week earlier.

Arson attacks were reported in 163 towns overnight -- about half the number hit a week earlier, Gaudin said.

Schools, gymnasiums, warehouses and public transport also have been set on fire during unrest.

Two police officers were injured, one burned in the face by a gasoline bomb while trying to put out flames of a burning vehicle, Gaudin said.

Some 2,503 people have been detained since the trouble started, with 364 of them convicted in expedited trials. Nearly 460 minors have gone before juvenile courts, 103 of whom were in the process of being charged, the Justice Ministry said.

In Brussels, Belgium, police detained about 25 youths near the Stock Exchange building on Saturday and the RTBF radio network said up to 50 were detained across the capital. Police were on high alert after Internet postings urging youths to attack downtown shops.

About 60 vehicles have been burned in Belgium in the past week, including more than a dozen already over the weekend, but the country has not seen rioting similar to that in France.

"These were isolated incidents and at no time was there any question of high tension or agitation," Belgium's Interior Ministry said in a statement early Saturday. "The situation is calm."