Eko Hot Blog reports that Mr Khashoggi, a prominent Saudi critic, was murdered at the Saudi consulate in Istanbul in October 2018.
US intelligence has said it believes Prince Mohammed ordered the killing.
But in court filings, the US State Department said he has immunity due to his new role as Saudi prime minister.
Mr Khashoggi’s ex-fiancé, Hatice Cengiz, wrote on Twitter that “Jamal died again today” with the ruling.
She – along with the human rights group Democracy for the Arab World Now (Dawn), founded by Mr Khashoggi – had been seeking unspecified damages in the US from the crown prince for her fiancé’s murder.
The complaint accused the Saudi leader and his officials of having “kidnapped, bound, drugged and tortured, and assassinated US-resident journalist and democracy advocate Jamal Khashoggi”.
The secretary general of Amnesty International, Agnes Callamard, said: “Today it is immunity. It all adds up to impunity.”
Source: BBC
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