Dunn Out at Best Buy

Best Buy announced Tuesday that CEO Brian Dunn has resigned. G. Mike Mikan has been named interim CEO, while a search for a permanent chief executive is conducted.

"There were no disagreements between Mr. Dunn and the company on any matter relating to operations, financial controls, policies or procedures," the company said in a statement. "There was mutual agreement that it was time for new leadership to address the challenges that face the company."

Dunn joined the company as a sales associate in 1985, eventually working his way up to the executive floor. He was named CEO in June of 2009.