Police are "baffled" as to the motive behind the latest rock attack on an Edmonton, Canada speed camera van. Two men dressed in black pelted the wildly popular vehicle which "frightened" the operator. The vigilantes escaped unharmed.

A photo radar van was dented and had three windows smashed by rocks yesterday, making it the ninth such van to be vandalized this year, say cops. And police believe those responsible for this most-recent attack could be linked to at least two other similar incidents this year, but are baffled as to the vandals' motives.