(CNN) With concern at the White House about potential blowback from FBI Director Christopher Wray, the FBI continues to have "grave concerns" over release of a memo from House Intelligence Chairman Devin Nunes, a source said Thursday.

"There are still grave concerns about this memo," an official familiar with the FBI stance told CNN.

The House Intelligence Committee, in a party-line vote on Monday, moved to release the highly controversial memo alleging abuse of surveillance powers by the FBI and put release of the memo in President Donald Trump's hands.

The FBI issued a statement warning against releasing the memo as the White House signaled Trump would make it public.

"As expressed during our initial review, we have grave concerns about material omissions of fact that fundamentally impact the memo's accuracy," the FBI said in a statement Wednesday.

Read More