Utrecht University closed all its buildings and trains were not allowed to run into the city's central station. Utrecht, the Netherlands' fourth largest city, has a population of about 340,000.

Step into a city where the old world meets the new, where canals weave through a tapestry of history and culture. A quieter, ...

Trains are also not allowed to run into Utrecht Central station, and mosques across the city have reportedly been closed due to security concerns. Heavily armed police reportedly gathered outside ...