Dutch prosecutors claim that the suspect in Utrecht's deadly tram shot confessed, and said he acted alone.
The 37-year-old suspect, Gokmen Tanis, is accused of multiple murder with terrorist intent.
The spokesman of the opposition, Frans Zonneveld, declared at the meeting. Associated Press on Friday that the reason for the shooting on Monday that caused the death of three people and three seriously injured is still under investigation.
Tanis was arrested a few hours after the tram was fired on Monday and police say he was detained on charges of murder or manslaughter with terrorist intent.
According to reports from Sky News, German authorities said they had arrested 10 people suspected of having planned an ISIS attack using cars and firearms.
Filming in Utrecht, which took place at 10.45am Monday morning (8.45am Monday night AEDT) triggered a major terrorist alarm, with the level of Utrecht terrorist threat raised to the highest possible, armed police sent to airports and government buildings and local schools placed on the block.
Tanis' family told the Turkish newspaper Anadolu that he had "family problems" and that a relative had been killed along with people who had come to his aid.
The shooting took place on a tram in the square of October 24, near a residential area outside the city center, and the police merged into a nearby apartment building.
They also released a still picture from the CCTV, apparently showing Tanis aboard a tram, and asked the public about him.
The Dutch media reported that Tanis should have appeared in court on March 4 for an alleged rape case in which a female was the victim of sexual violence several times and threatened to burn her home.
Furthermore, according to the Dutch media, he had other problems with the law, including an accident in 2013, in which he was accused of attempted manslaughter, burglary, police assault and other minor questions of shoplifting and driving intoxication.
Utrecht, a city of about 350,000 people, is about a 45-minute drive south of the capital Amsterdam, and is best known for its famous university, which is almost 400 years old, and for its pretty canals.