The 33rd annual Western States 100-Mile Endurance Run is in the books. And this one appears to have stirred a little controversy.

While Seattle’s Brian Morrison crossed the finished line first in 18 hours, 5 minutes and 13 seconds, according to the “unofficial” results on the Western States Web site, the 27-year-old received assistance from others during the final stretch on the Placer High School track.

Race rules state that a runner cannot receive assistance on any portion of the trail other than aid stations.

As of Sierra Sun press time on Sunday, an official winner had yet to be announced, though Morrison is listed as an “unofficial” winner on the Western States site.

Graham Cooper, 36, of Oakland, finished behind Morrison in 18:17:27. He will be named winner if Morrison is disqualified.

Nikki Kimball, from Bozeman, Mont., won the women’s race in 19:26:50.

Tim Twietmeyer, a five-time winner who entered the race for his 25th and final time, finished 12th in 20:33:49.

See Tuesday’s Sierra Sun for more on the 33rd annual Western States Endurance Run.