Saudi political dissident Manea al-Yami was killed in Lebanon, the Saudi opposition National Assembly Party (NAAS) and a Lebanese security source said on Sunday.
In a statement posted on Twitter, NAAS, an opposition grouping founded by Saudis living mostly in exile, said Yami was "assassinated in suspicious circumstances" on Saturday.
It demanded a "just, clear and transparent investigation" of the killing, saying it held Saudi authorities responsible for failing to safeguard citizens seeking more freedoms abroad.