The U.S. Department of Justice may announce as early as next week that special counsel Robert Mueller has given the attorney general his report on the federal Russia investigation, CNN said on Wednesday, citing unnamed sources.

After the expected announcement, U.S. Attorney General William Barr will review Mueller's findings and submit his own summary to Congress, CNN reported.

A Justice Department spokeswoman declined comment on the CNN report. Peter Carr, a spokesman for Mueller, also declined comment.