WASHINGTON (Reuters) - Saudi Crown Prince Mohammed bin Salman has urged transparency in dealing with the consequences of the killing of Saudi journalist Jamal Khashoggi, Saudi Arabia's top adviser to the president said on Wednesday.

Kouchner, the son-in-law of Donald Trump and his adviser, was hosted Tuesday at a Time magazine forum in New York City to launch the list of the 100 most influential figures in which Kouchner was named.

Kouchner told the audience that he had advised bin Salman to be transparent in dealing with the consequences of Khashoggi's death inside the Saudi consulate in Istanbul, stressing that the State Department and Minister Mike Pompeo were working closely with the Turks and Saudis to find out what had happened, describing the crime as a terrible tragedy.

Kouchner added that Saudi Arabia's human rights record was affecting relations between Washington and Riyadh.

On the situation in Yemen, the top adviser to the president said he had asked the Saudis to ease restrictions to deliver aid to the Yemeni people.

Kouchner said he hoped to present his plan for peace in the Middle East - dubbed "Century Deal" - late last year, but Israeli Prime Minister Benjamin Netanyahu announced elections and still needs time to form a coalition government.

"When we're done, we'll probably be in mid-Ramadan, but we'll wait until after Ramadan ends, and then we'll reveal our plan," Kouchner said.

A few days ago, a well-informed source said Jared Kouchner had urged a group of ambassadors to be "open minded" to Trump's peace proposal, which would require "reasonable concessions" from all parties. He said the plan had been postponed until after the end of Ramadan in early June Next June.