Originally posted by Claus:

Spoke to my Cousin, who is a cop at one of the 5 police stations in Copenhagen, the people that are rioting are not Muslims but young Anarchists who will take any opportunity to fight the cops.

Authorities have arrested dozens of youths, predominantly with immigrant backgrounds.

Eleven people were arrested on suspicion of vandalizing and torching schools, cars and garbage containers, with 25 small fires burning overnight, police said. The unrest - largely in immigrant neighborhoods - has spread through Copenhagen and across Denmark.

Police are unsure what triggered the unrest but some say youths from Denmark's immigrant communities were protesting against perceived police harassment - anger apparently aggravated by the publication Wednesday of a cartoon lampooning the Prophet Muhammad.

Muslim Youth Violence in Danish Cities Continues for 6th Night; 43 Arrested

Police said they were not sure what triggered the unrest. Some observers said immigrant youths were protesting against perceived police harassment, and suggested the reprinting of the cartoon may have aggravated the situation.