The NFL says no artificial crowd noise was pumped into the RCA Dome on Sunday during the New England-Indianapolis game, despite claims otherwise by Patriots' Team President Jonathan Kraft. "CBS has informed us that the unusual audio moment heard by fans during the Patriots-Colts telecast was the result of tape feedback in the CBS production truck and was isolated to the CBS broadcast," NFL spokesman Greg Aiello said Monday. "It was in no way related to any sound within the stadium and could not be heard in the stadium." Yahoo! Sports reported earlier that the NFL was looking into charges Kraft made after Sunday's 24-20 New England win. Kraft told NFL Vice President of Security Milt Ahlerich -- the same man involved in confiscating the Patriots' videotape made in a Week 2 game against the New York Jets that cost Belichick $500,000, the Patriots $250,000 and a first-round draft pick -- that he felt there was extra noise in the stadium. Aiello said, according to Yahoo!, "We're aware of it, and we're looking into it. It may just be the TV feed from CBS, but we're checking it out." Monday, he said that was indeed the case.