According to a police spokesperson, the doctor was bound and threatened with a firearm. The police evacuated the building. The released doctor was sent for a medical examination.
"Four SWAT vans came and men with walkie-talkies," an eyewitness said to newspaper AD. He also saw negotiators and people in bulletproof vests arrive. "I was cycling by on my way home from school. I saw people coming out of the building. They were crying."
Medewerkers kliniek staan nog te wachten. Mogen van de afdeling marketing niet met de pers praten pic.twitter.com/WkGKXBFqDF— Antti Liukku (@anttiliukku) 21 декабря 2017 г.
TWEET: Employees of the clinic are still waiting. The marketing department isn't speaking to the press.
Mogelijke gijzeling kliniek Jan Leentvaarlaan. AT ter plaatse pic.twitter.com/AYEsUQmM6b— Antti Liukku (@anttiliukku) 21 декабря 2017 г.
TWEET: Possible hostage in clinic, AT on site.
The hostage taker did not say why they were in the clinic, an eyewitness said.
Law enforcement agencies are inquiring into the circumstances of the incident, although police haven't made any arrests yet.