Steelers suffer shock defeat

Kansas City: The Pittsburgh Steelers, last season's Super Bowl champions, were shocked 27-24 in overtime by the Kansas City Chiefs at Arrowhead Stadium on Sunday.

Ryan Succop kicked the game-winning 22-yard field goal with 8:28 left in overtime.

"They are the Super Bowl champions and they are an organisation to be and try and get to," said Chiefs quarterback Matt Cassell, who set up the winning field goal with a 61-yard completion to Chris Chambers. "To come out here and get a big win is huge, for not only this team going forward, but also this organisation."

Kansas City's defence forced three turnovers, including two interceptions by linebacker Andy Studebaker.

"I take responsibility for that performance," Steelers coach Mike Tomlin told reporters. "I have to have this football team better prepared to play.

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"Ultimately we have to play better than what we played in that stadium. We are capable of much more than that. You have to tip your hat to the Chiefs because they played well enough to win. But that's not what we're capable of. That's not us, and it won't be us. But it was us today."

Steelers quarterback Ben Roethlisberger completed 32 of 42 passes for 398 yards and three touchdowns, but was removed from the game in overtime after taking a knee to the head.