COPENHAGEN, Denmark (AP) — Danish police say four city buses were destroyed in a pre-dawn fire and a fifth was vandalized with anti-Israel graffiti at a bus depot in Copenhagen.

Investigator Jens Moeller Jensen says police suspect arson and are investigating possible links to a decision last week by city transit officials to remove bus ads by a pro-Palestinian group calling for a boycott of Israeli goods.

He said "there could be a political motive. We consider this one theory ... but we cannot link it to anything for now."

The buses were parked for the night at a depot in northern Copenhagen. Photographs from the scene showed the badly charred buses surrounded by firefighting foam.

Moeller Jensen said no one was injured and police had no suspects.