MILWAUKEE — The Green Bay Packers have filed tampering charges against the Minnesota Vikings alleging that the team made inappropriate contact with Brett Favre, a person familiar with the Packers' complaint told The Associated Press Wednesday night.

The person, who requested anonymity because of the sensitivity of the subject, said Packers officials have expressed their belief that interest from the Vikings was driving Favre's sudden change of heart about playing football in 2008.

"They feel like Favre had something (in place), and that's why he was so anxious to get his release all of a sudden," the person said.

The tampering charges were reported by Foxsports.com earlier Wednesday.

The person said the league already has reviewed evidence provided by the Packers, and team officials believe a league examination of telephone records will indicate more than "normal contact" between Favre and Vikings offensive coordinator Darrell Bevell, a former Green Bay assistant. According to the person, Packers officials also believe the contact began before Favre and his agent, Bus Cook, formally asked the Packers to release him.

NFL spokesman Greg Aiello said the league had no comment on the report. Cook did not return a telephone message left by The Associated Press earlier Wednesday.

The tampering charges added a new twist to the Favre saga, which seemed to be over when Favre retired in early March, but now has been sizzling for several weeks.

Now, with Favre potentially headed back to an even chillier reception than the below-zero conditions in his last game at Lambeau Field when he makes a scheduled appearance at the Packers' Hall of Fame banquet this weekend, the next step in the iconic quarterback's plan to maneuver his way out of Green Bay is unclear.

Cook, told ESPN on Wednesday that he and Favre have "no definite plans to ask for reinstatement" and it was up to the Packers to decide what to do next.

"It's their move," Cook said.

Favre currently is on the Packers' reserve/retired list. To be reinstated, Favre must write a letter to NFL commissioner Roger Goodell. Once that request is approved — a step considered a formality — the Packers would have to release Favre or place him on their active roster.

CHIEFS SIGN DRAFT PICK KEVIN ROBINSON: The Chiefs agreed to three-year deals with draft picks Kevin Robinson and Brian Johnston on Wednesday. Terms of the contracts were not available.

Robinson, a receiver, was one of Kansas City's two sixth-round picks. He caught 178 passes for 2,485 yards in 46 games for Utah State. He set school records with 1,104 yards and four touchdowns on punt returns, and 2,725 yards and four touchdowns on kickoff returns.