One bather said that the aggressive and contemptuous behaviour of the men, who were of Mediterranean appearance but spoke fluent German, was frightening

A group of Muslim men stormed a swimming lake for nudists in Germany shouting Allahu akbar (God is greatest) at bathers and calling women “sluts” who deserved to be “wiped out”.

The incident at a resort in Geldern in the state of North Rhine-Westphalia is the latest in a series of outbursts at swimming areas across the country involving young Muslim men targeting women. Police in Düsseldorf said that they had “grave worries” about the trend.

It occured at the naturist area of the Strandbad Xantener Südsee resort last week, two days after an Afghan refugee attacked five people on a train in Bavaria and four days before a supporter of Isis blew himself up at a wine bar in Ansbach.

A group of “Mediterranean-looking