WASHINGTON — Saudi Crown Prince Mohammed bin Salman sent at least 11 messages to his closest adviser, who oversaw the team that killed journalist Jamal Khashoggi, in the hours before and after the journalist’s death in October, according to a highly classified CIA assessment.

The Saudi leader also in August 2017 had told associates that if his efforts to persuade Khashoggi to return to Saudi Arabia weren’t successful, “we could possibly lure him outside Saudi Arabia and make arrangements,” according to the assessment, a communication that it states “seems to foreshadow the Saudi operation launched against Khashoggi.”