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.
Dutch judges ruled that the trial could continue despite none of the four accused men turning up at court.
Proceedings could go ahead "in absentia" against three of the suspects - Russians Igor Girkin, Sergei Dubinsky and Ukrainian citizen Leonid Kharchenko, chief judge Hendrik Steenhuis said.
"We assume they have waived their right to be present since they do not value the right to be present," Judge Steenhuis said, adding that attempts had been made to issue summonses by post and social media.
"The court will allow the due process to prevail in the case against Girkin, Dubinsky and Kharchenko and we will try them in absentia."
A fourth suspect, Russian national Oleg Pulatov, would be represented by a lawyer but would not be present, the judge added.
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.
Judge 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."
Judges at the start of the trial of four men charged with murder over the downing of Malaysia Airlines Flight 17 Source: EPA
'Gaps in evidence'
Dutch prosecutors last year charged Russian nationals Igor Girkin, Sergei Dubinsky, Oleg Pulatov and Ukrainian citizen Leonid Kharchenko - all linked to pro-Moscow separatists in eastern Ukraine - over the tragedy.
Despite international warrants issued for their arrest, none of the four suspects is expected to attend the court.
Russia has long denied any involvement in the downing of MH17, and has offered a series of alternative explanations for the plane's downing.
Moscow again on Friday accused the Netherlands of a "crude attempt to put pressure on the court".
"In the last days before the hearings everything was done to fill the gaps in the evidence presented and to camouflage the falsification of the facts of this version in advance," Russian foreign ministry spokeswoman Maria Zakharova said.
But Dutch Prime Minister Mark Rutte said on Friday that the trial was being held in "full independence" and was a "very important step to get to the truth and to find justice for the victims and their relatives".
Relatives of victims of MH17 embrace as they arrive to watch a live transmission of the court session at a congress centre in Nieuwegein Source: AP
More than two-thirds of the victims - 196 in total - were Dutch.
US Secretary of State Mike Pompeo lent his support on the eve of the trial, saying he had "full confidence" in the Dutch justice system and those responsible "must be held accountable".
