11.   Officials said that train derailed due to a broken wheel at a switch and crashed into an overpass.

12.   Schumacher explained that he was lucky to have ended the race with a broken front wheel.

13.   That accident was blamed on a broken wheel.

14.   The cause of that crash was determined to be a broken wheel.

15.   The broken wheels on some hospital beds have been padded with diapers and sanitary towels to stop jagged struts ripping up floor tiles.

16.   The cause in that event also was a broken wheel and suspension parts that hurdled a catch fence.

17.   The cause of that crash was found to be a broken wheel.

18.   The investigation focused on the possibility of a broken rail, a broken wheel or axle, or vandalism.

19.   The wreck was caused by a broken wheel, but it was still unclear whether the wheel broke due to a defect, metal fatigue or some outside force.