In her Tuesday's briefing to a selected few lawmakers, the CIA Director gave a classified briefing on the killing carried out on October 2 which prompted the senators' calling for a full Senate brief, Xinhua news agency reported.
"CIA Director Haspel should brief the full Senate without delay," Schumer, a New York Democrat, said in his statement later in the day.
Senator Rand Paul, who was excluded from the Tuesday's briefing, said that the small group briefing was an example of the "deep state".
"Why shouldn't every senator know what is going on?" the Kentucky Republican said on his Twitter, "This is just ridiculous!"
After releasing the results of its initial investigation, the Saudi Public Prosecution announced that 18 Saudis were arrested for their alleged connections with the killing.
The US Treasury imposed sanctions on 17 individuals over their alleged roles in the killing of Khashoggi in mid-November, following the US State Department's decision in late October to revoke 21 Saudi suspects' visas.
The US Congress has urged a thorough investigation into the murder of Khashoggi, and threatened to take more actions against Saudi Arabia if those responsible were not held accountable.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)