"We don't know why they're rioting. I think it's because they're bored. Some people say it's because of the cartoons but that's not my opinion," Olesen said.
He was referring to the reprinting of a controversial cartoon of the Prophet Mohammed in 17 Danish newspapers on Wednesday.
The drawing, published in Denmark for the first time in 2005, sparked several months of angry protests in the Muslim world in 2006. It depicted the prophet with a turban resembling a bomb with a lit fuse.
Protests have flared up again in several Muslim countries including Kuwait and Pakistan following the reprinting. The Palestinian Islamist movement Hamas also condemned the publication.