The international group of specialists conducting a criminal investigation into the crash of the Malaysia Airlines Flight MH17 in eastern Ukraine in July 2014 is examining "several parts, possibly originating from a Buk surface-air-missile system," the Dutch Safety Board reported on Tuesday.

"In cooperation with the Dutch Safety Board (DSB), the Joint Investigation Team (JIT) are investigating several parts, possibly originating from a Buk surface-air-missile system. These parts have been secured during a previous recovery-mission in Eastern-Ukraine and are in the possession of the criminal investigation team MH17 and the Dutch Safety Board," it said in a press release.

"At present the conclusion cannot be drawn that there is a causal connection between the discovered parts and the crash of flight MH17," it said.

"The parts are of particular interest to the criminal investigation as they can possibly provide more information about who was involved in the crash of MH17," according to the press release.

"For that reason the JIT is further investigating the origin of these parts. The JIT will internationally enlist the help of experts, among others forensic specialists and weapon-experts," it said.

The international group is conducting the criminal inquiry, while the Dutch Safety Board is working to establish the immediate reasons behind the Malaysian Boeing crash, it said.

"Both investigations are conducted separately but the JIT and the DSB occasionally share material. In its final report the Dutch Safety Board will report on the discovered parts," according to the press release.

Dutch Safety Board spokesperson Sara Vernooij said on Monday that the DSB-led group was meeting in the Netherlands to discuss the course of the investigation into the Flight MH17 crash in eastern Ukraine.

These expert consultations are expected to continue for several days.