In the early hours of Monday, an unknown person cut through the fence surrounding a vehicle safety testing centre in the suburb of Brøndby and set fire to numerous cars, Copenhagen Vestegn Police said.
“Fire was set to several cars and in total there are eight cars burnt,” spokesman Brian Munck told news agency Ritzau.
Munck said that police have not yet established a connection to last month's spate of vehicle fires in the Copenhagen area.
“It could be a lot of things, so we don't know. It's difficult to say,” he said.
The Brøndby car fires were preceded by a similar incident in the western suburb of Albertslund the night before.
Early on Sunday morning, eight cars were burnt in a residential carport but police had not established the cause of those fires as of Monday.
“The fire started in a Toyota Yaris and then spread to the other cars. We don't know if a technical problem in the Yaris started the fire or if there is another explanation,” Jeff Nielsen of Copenhagen Vestegn Police told Ritzau.
The newest incidents mean that nearly 50 vehicles have burnt in the Copenhagen area since mid-August.
A 21-year-old man from Amager has been arrested on the suspicion that he was behind at least some of those fires but around half of the total vehicle fires have happened after the arrest.