Sen. Rand PaulRandal (Rand) Howard PaulOvernight Defense: Senate confirms Haspel as CIA chief | Trump offers Kim 'protections' if he gives up nukes | Dem amendments target Trump military parade Hillicon Valley: Lawmakers target Chinese tech giants | Dems move to save top cyber post | Trump gets a new CIA chief | Ryan delays election security briefing | Twitter CEO meets lawmakers Overnight Finance: Watchdog weighs probe into handling of Cohen bank records | Immigration fight threatens farm bill | House panel rebukes Trump on ZTE | Trump raises doubts about trade deal with China MORE (R-Ky.) is being confronted with new evidence his 2013 book Government Bullies borrowed whole paragraphs from the work of other writers.

The new finding, first reported in Buzzfeed, lists four paragraphs in which Paul uses nearly identical phrasing as earlier reports. Paul did cite the publications in the notes of his book, according to the publication. 

Three pages of his book had already been found to come from conservative think tank reports, according to Buzzfeed. 

The paragraphs in question Thursday borrowed from two articles that appeared in the Cato Institute’s Regulation Magazine, according to Buzzfeed. Paul also cribbed from the magazine Environmental Protection

Earlier this week, Paul said he would implement a new policy in his office to more rigorously vet his publications and speeches. Paul has acknowledged the improper citation from the book after Buzzfeed found earlier instances. 

Paul had said earlier in the week that he could not rule out other instances of plagiarism being found. 

Doug Stafford, Paul’s senior adviser, issued a statement Tuesday, saying a large number of staffers "provide supporting facts and anecdotes – some of which were not clearly sourced or vetted properly."

Paul has taken responsibility for the errors in the book, but has maintained that he never intentionally tried to pass off other people’s work as his own. 

I'm not perfect,” Paul said earlier this week on Fox. “I do make mistakes. In the book in fact we made a mistake. It should have been blocked off or indented to show that it was a quotation. It was footnoted at the end. We didn't try to pass off anything as our own.”