Was it an air raid siren? And whose voice is that? Utrecht residents awakened in the middle of the night by loud alarms

Was it an air raid siren And whose voice is

Around 12:30 am, several reports were received by the police about a loud alarm. The police do not want to say how many reports are involved. A police spokesperson did report that it was a fire alarm at the Galgenwaard stadium. A lit cigarette may have been the culprit. It is not clear whether the fire alarm came from the stadium itself, or, for example, a surrounding house or business.