The Danes have been running scared ever since a series of allegedly anti-Muslim cartoons were published in a Danish newspaper last September:

Danish authorities said they foiled a serious terror plot Tuesday with the arrest of nine men accused of preparing explosives for a planned attack in Denmark.

Investigators were not sure how advanced the plans were but said they decided to launch a pre-emptive strike Tuesday after keeping the group under surveillance for some time.

“The clues police found indicate that they were very likely planning an attack somewhere in Denmark,” Justice Minister Lene Espersen told The Associated Press.

“It was the most serious matter I have had in my time as justice minister,” she said. “Police went in and stopped the group as it was preparing an attack.” 

Full article here.