German officials and media have reacted with alarm to two violent outbreaks amid otherwise peaceful, mainly Kurdish, protests in Germany over the fighting in Syria and Iraq. Police say 22 people were hurt in the riots.

German newspaper commentators said in their Thursday editions that clashes in the two northern cities on Tuesday evening had illustrated the potential spillover impact of the Middle East's complex conflicts.

On Tuesday evening, an initially peaceful demonstration outside Hamburg's Al-Nour mosque by Kurdish immigrants - protesting inaction as "Islamic State" (IS) jihadists made gains in Syria's northern city of Kobani - turned violent.

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