A man has admitted to killing three people on a tram in Utrecht and said he acted alone, Dutch prosecutors say.
Turkish-born Gokmen Tanis, 37, wounded five others and was arrested on Monday after a city-wide manhunt.
A judge on Friday extended his detention for two weeks as investigations continue.
Prosecutors are assessing whether he was driven by terrorist motives or his actions came from personal problems combined with radicalised ideas.
Three other men, aged 23, 27 and 40, were arrested after the incident but have since been released.
Prosecutors said their investigation now led them to believe the gunman had no help from other people.
A spokesman for the public prosecutor said the suspect had admitted three charges:
- murder or manslaughter with a terrorist intent
- attempted murder or manslaughter with a terrorist intent
- making threats with terrorist intent