That depends on the question. If the question refers to investigations pursuant to our legal duties (intelligence and security, and security screenings), then the answer is: yes. If the question refers to a police investigation, then the answer is: no.
The legal basis for our duties is Article 8 of the Security and Intelligence Services Act 2017. The AIVD may also participate in a joint investigation, together with one or more services from other countries, provided this remains within the AIVD's stipulated duties.
The AIVD does not particpiate in police investigations. Article 8 does not provide any basis for such a possibility.