Oklahoma St. 68, Iowa St. 55

STILLWATER, Okla., Jan. 29 (UPI) -- Victor Williams scored 18 points Wednesday night as No. 11 Oklahoma State made it 15 straight wins with a 68-55 Big 12 Conference triumph over Iowa State.

Williams converted a three-point play with 7:40 remaining to cap an 11-2 run and give the Cowboys their biggest lead, 53-40.

Tony Allen added 15 points and Melvin Sanders chipped in 12 for Oklahoma State (17-1, 6-0 Big 12 South), which has not lost since a 66-58 setback to the College of Charleston in the second round of the Great Alaska Shootout.

Iowa State (11-6, 1-5) is headed in the opposite direction. Freshman Adam Haluska scored 15 points but could not prevent the Cyclones from their fifth loss in six games.