The four men arrested for their alleged involvement in the explosion in The Hague last weekend will remain in custody.
The men will remain in prison following the Dutch investigating judge's decision on Friday.
The four are suspected of arson and causing an explosion in The Hague's Mariahoeve district. The explosion killed six people, injured several others and destroyed five apartments. The men are also suspected of setting a car on fire and preparing for this act of arson in advance, according to the Public Prosecutor's Office.
The suspects will appear before the court chamber on 24 December, where a decision will be made on whether to extend their pre-trial detention.
Police believe the explosion targeted a wedding shop on the ground floor of the building that was destroyed.
Three of the deceased were from the same family: a 45-year-old man, a 41-year-old woman and their 17-year-old daughter. An eight-year-old boy is the family's sole survivor. The other three victims were men aged 31, 44 and 63.
