NEW YORK (AP) — Columbia University says it has fired a prominent neuroscientist and plans to dissolve his lab program, noting "serious violations" uncovered during an internal investigation.

In a Wednesday statement, Columbia says it has ended the administrative positions of Thomas Jessell and will be winding down the Jessell Lab. The decision follows an internal investigation that revealed "serious violations of university policies and values."

The university declined to specify the nature of Jessell's violations. Officials say they would preserve the lab's research and would work to help those currently employed by the lab.

The 66-year-old Jessell was a winner of the prestigious Kavli Prize for Neuroscience in 2008 and has been a fellow of the Royal Society of London since 1996. He did not respond to a request for comment Wednesday.