BEARS 16 Bracy Walker, who earlier returned a blocked field goal 92 yards for a third-quarter touchdown, intercepted a third-down pass in the end zone by Rex Grossman with 18 seconds left in the game, preserving a 20-16 victory Sunday for the Detroit Lions over the mistake-prone Chicago Bears.

The Lions snapped their NFL-record, 24-game road losing streak and spoiled the debut of Bears Coach Lovie Smith.

Joey Harrington tossed a four-yard scoring pass to Az-Zahir Hakim with 9 minutes 54 seconds to go, putting Detroit ahead to stay, 20-14.

With 1:54 left, facing a punt out of their end zone, the Lions chose to have punter Nick Harris run out of the end zone for a safety. It cut the lead to 20-16, but gave the Lions a free kick -- a strategy that nearly backfired.

R.W. McQuarters returned the free kick 37 yards to the Detroit 47 and Grossman's 19-yard pass to David Terrell and a 15-yard run by Thomas Jones (Virginia) got the Bears to the Lions 9.

With no timeouts, Grossman was sacked and then had to spike the ball on second down. Scrambling on third down, he threw the ball to the corner for Terrell, but Walker made the interception.

The Lions lost cornerback Dre Bly in the first quarter to a knee injury of undetermined severity. Earlier, receiver Charles Rogers left with a shoulder injury.

Detroit's Bracy Walker (28) celebrates clinching interception in the end zone with Brock Marion.