Favre investigation on fast track

The NFL is aggressively investigating allegations that Minnesota Vikings quarterback Brett Favre sent inappropriate messages and photos to a former Jets employee, a source familiar with the league's review told ESPN's Chris Mortensen.

The investigation is on a fast track and commenced Thursday, the same day that Deadspin.com posted voice messages and salacious photos that Favre allegedly sent to Jenn Sterger when both were employed by the New York Jets in 2008.