The sons of murdered Saudi journalist Jamal Khashoggi said Friday that they "forgive" the killers of their father.

"We the sons of martyr Jamal Khashoggi announce we forgive and pardon those who killed our father," the Washington Post columnist's son Salah Khashoggi said on Twitter.

Khashoggi -- a royal family insider turned critic -- was killed and dismembered at the kingdom's consulate in Istanbul on October 2, 2018, in a case that triggered international outrage.

Salah has previously said he had "full confidence" in the judicial system, and criticised opponents he said were seeking to exploit the case.

The Washington Post reported in April that Khashoggi's children, including Salah, had received multimillion-dollar homes and were being paid thousands of dollars per month by authorities.