- Featuring a portrait of Khashoggi against a back drop of American flags, the ceremony began with a moment of silence.
- Meanwhile Margaux Ewen, North America director for Reporters without Borders, warned that "journalists, bloggers, and media workers are under threat" every day.
US lawmakers from both parties, friends of murdered journalist Jamal Khashoggi and press freedom groups on Thursday marked 100 days since the Saudi dissident's assassination.
Featuring a portrait of Mr Khashoggi against a back drop of American flags, the ceremony began with a moment of silence.
"The murder of Khashoggi is an atrocity and an affront to humanity," said Speaker of the House Nancy Pelosi during the event in Washington.
Mr Khashoggi, a Washington Post contributor who lived in the US, was killed in October at the Saudi consulate in Istanbul, where he had gone to pick up paperwork needed for his upcoming marriage to his Turkish fiancee.
Over three months later, his body's whereabouts remain unknown. Turkish and US officials accuse Crown Prince Mohammed bin Salman of orchestrating the killing -- an allegation Saudi authorities categorically refute.
In Washington, US President Donald Trump's response to Riyadh -- a key trade partner -- provoked outrage among lawmakers across the political spectrum.