Både USA og Russland har nå advart sine borgere når de besøker Paris, om å unngå de urolige områdene. Folk som skal til flyplassen Charles de Gaulle er blitt bedt om ikke å ta toget, for det går gjennom samme områder.

Volden blir stadig råere.

Bands of youths roaming Parisian suburbs burned more than 500 vehicles and hurled stones at police Friday, as the worst rioting in a decade entered its second week and spread elsewhere in France. The U.S. warned Americans against taking trains to the airport via strife-torn areas.

A savage assault on a bus passenger highlighted the dangers of travel in the impoverished outlying neighborhoods, where authorities were struggling to regain control.

Attackers doused the woman, in her 50s and on crutches, with an inflammable liquid and set her afire as she tried to get off a bus in the suburb of Sevran Wednesday, judicial officials said. The bus had been forced to stop because of burning objects in its path. She was rescued by the driver and hospitalized with severe burns.

Violence continued into the evening for the ninth night in a row with troublemakers firing bullets into a vandalized bus and setting a warehouse ablaze in the Paris area. In Meaux, east of Paris, police said youths prevented firefighters from evacuating a sick person from an apartment building, pelting them with stones and torching the awaiting ambulance.

Some 30 mayors from the Seine-Saint-Denis region where the unrest started Oct. 27 met Friday to make a joint call for calm. Claude Pernes, mayor of Rosny-sous-Bois, denounced a «veritable guerrilla situation, urban insurrection» that has taken hold.

A national police spokesman, Patrick Hamon, said there appeared to be no coordination among gangs in different areas. But he said youths in individual neighborhoods were communicating by cell phone text messages or e-mails — arranging meetings and warning each other about police operations.

Rioting Spreads Beyond Paris Suburbs