Five cars were set on fire in Brussels overnight, raising the number of vehicles burned in the Belgian capital to 10 since Sunday in what officials say appeared to be an imitation of violence in France, according to Reuters. There were also minor incidents of arson in the northern town of Sint Niklaas -- where a car was also set ablaze -- and the eastern city of Liege, authorities reported. Belgian officials played down the extent of the incidents. "There were no riots. These were all very isolated incidents. Whoever set fire to the cars must have been influenced by the footage of what is going on in France," Brussels fire department spokesman Francis Boileau said. "These are only isolated cases. Our prevention units and local police officers are working on it. They really know these youngsters. I have no fear," Jacques Simonet, the mayor of the Brussels district of Anderlecht, told VTM television.