Two years since sexual assaults by immigrant men took place in Cologne on New Year's Eve, cities across the country plan on amping up their security measures for Silvester 2017.

North Rhine-Westphalia

In the western German city of Cologne, the security area in which fireworks are forbidden has been extended to include the city's Cathedral. It was in this square where numerous sexual assualts were reported in 2015.

"About 1,400 officers will be deployed," said Cologne police commissioner Uwe Jacob. Authorities expect there to be as many visitors celebrating the New Year in the city as in previous years.

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