A writ filed in Chicago yesterday claimed that Igor Strelkov, a Russian also known as Igor Girkin, was acting with the "actual or apparent" authority of President Vladimir Putin's government when the Malaysia Airlines jet was blown out of the sky, killing all 298 people on board.
Relatives of 17 victims are being represented by a US-based firm specialising in aviation litigation, which is claiming at least USD 50 million for each of the plaintiffs' loved ones.
"What does he have to do with this anyway," she said on Russian radio.
The court papers say that "Flight 17 flew over the airspace of the area in which the aforesaid rebel army was waging its war activities and the rebel army under the command responsibility of defendant Girkin shot down the subject Boeing 777-200 aircraft."
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"Defendant Girkin ordered, aided and/or abetted this action and/or conspired with those persons who fired the missile or missiles."
All 298 passengers and crew on board -- the majority of them Dutch -- died.
Ukraine and the West have accused the separatists of using a surface-to-air missile supplied by Moscow to down the Boeing.
Russia has denied the claim and suggested that a Ukrainian missile may have hit it.
In a bid to counter raging accusations that he was personally guilty, an ashen-faced Putin recorded an unprecedented nighttime video address soon after the tragedy, urging the West and Kiev not to exploit the disaster for political gains.
Putin, speaking to Dutch Prime Minister Mark Rutte today, said that establishing such a court would be both premature and counterproductive.