The Green Bay Packers lost sole possession of the NFC North Division lead yesterday.
The Pack and Chicago are both 6-3 after the Bears won a 27-13 home game over Minnesota while the Packers had their bye.
Chicago's Jay Cutler threw for 237 yards, three touchdowns and two interceptions. Devin Hester caught a touchdown pass and had 147 return yards, as the Bears won their second straight.
Brett Favre completed 18 of 31 passes for 170 yards. The former Green Bay quarterback had three more interceptions and a lost fumble.
The Vikings have now lost eight straight regular season games on the road dating back to last year.
Favre now has 16 interceptions - nine more than all of 2009. He and the Vikes will host Green Bay next Sunday.
The Detroit Lions blew a chance to tie Minnesota for third place in the NFC North. The Lions lost their 25th straight road game 14-12 at Buffalo.
Fred Jackson ran for 133 yards and had both a rushing and a receiving touchdown, as the Bills won their first game against eight losses.
Ex-Packers' kicker Dave Rayner had two field goals for the Lions in place of the injured Jason Hanson. Detroit fell to 2-7.