Four men accused of murder over the downing of Malaysia Airlines flight MH17 in 2014 went on trial in the Netherlands on Monday, with families of the 298 victims calling for justice.
The suspects -- three Russians and a Ukrainian -- were not present in the dock, but judges were expected to rule that the hearing could continue in their absence.
Families have fought for more than half a decade for justice for the victims who were killed when the jet was shot down over eastern Ukraine by a Russian-made missile as it travelled from Amsterdam to Kuala Lumpur.
Head judge Hendrik Steenhuis declared the trial open at the court near Amsterdam's Schiphol Airport where the flight took off, adding that there had been a "tragic loss of human lives from all around the world" in the "atrocious disaster".
The courtroom in the high-security building was packed with relatives, lawyers and journalists, with many family members expected to speak during the trial.
"I think today is of the highest importance," said Piet Ploeg, head of a foundation for MH17 victims who lost his brother, sister-in-law and nephew on the doomed flight.
"This is the first day that we will know what happened, who was responsible, why the plane was shot down, and to questions like what was Russia's role.
"There are relatives who want the smallest details, who want justice to be done. And there are others who want life to move on, who want to leave that all behind them."