PARIS - Ten nights of urban unrest that brought thousands of arson attacks on cars, nursery schools and other targets from the Mediterranean to the German border reached Paris where at least 28 cars were burned overnight in the French capital, government officials said Sunday. Police found a gasoline bomb-making factory in a southern suburb of the city, with more than 100 bottles, gallons of fuel and hoods for hiding rioters' faces, a senior Justice Ministry official said Sunday.