Dutch counter terrorism police prepare to enter a house with a sniffer dog equipped with a camera after a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. A gunman killed three people and wounded nine others on a tram in the central Dutch city of Utrecht, sparking a manhunt that saw heavily armed officers with sniffer dogs zero in on an apartment building close to the shooting. (Peter Dejong / AP)
Dutch counter terrorism police use a robot as they prepare to enter a house after a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. A gunman killed three people and wounded nine others on a tram in the central Dutch city of Utrecht, sparking a manhunt that saw heavily armed officers with sniffer dogs zero in on an apartment building close to the shooting. (Peter Dejong / AP)
A Dutch police officer helps people evacuate an area where counter terrorism police prepare to enter a house after a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. A gunman killed three people and wounded nine others on a tram in the central Dutch city of Utrecht, sparking a manhunt that saw heavily armed officers with sniffer dogs zero in on an apartment building close to the shooting. (Peter Dejong / AP)
Dutch counter terrorism police leave after searching a house following a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. A gunman killed three people and wounded nine others on a tram in the central Dutch city of Utrecht, sparking a manhunt that saw heavily armed officers with sniffer dogs zero in on an apartment building close to the shooting. (Peter Dejong / AP)
A forensics expert looks for clues inside a tram after a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. A gunman killed three people and wounded nine others on a tram in the central Dutch city of Utrecht, sparking a manhunt that saw heavily armed officers with sniffer dogs zero in on an apartment building close to the shooting. (Peter Dejong / AP)
A resident peers out from a window as Dutch counter terrorism police prepare to enter a house after a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. A gunman killed three people and wounded nine others on a tram in the central Dutch city of Utrecht, sparking a manhunt that saw heavily armed officers with sniffer dogs zero in on an apartment building close to the shooting. (Peter Dejong / AP)
CAPTION CORRECTS THE NAME - This image made available on Monday March 18, 2019 from the Twitter page of Police Utrecht shows an image of 37 year old Gokmen Tanis, who police are looking for in connection with a shooting incident on a tram. Police, including heavily armed officers, flooded the area after the shooting Monday morning on a tram at a busy traffic intersection in a residential neighborhood. (AP)
Dutch counter terrorism police close in on a house after a shooting incident in Utrecht, Netherlands, Monday, March 18, 2019. Police in the central Dutch city of Utrecht say on Twitter that "multiple" people have been injured as a result of a shooting in a tram in a residential neighborhood.