LONDON - After a tough pair of races, Alise Post will not be competing for a medal in the Olympic BMX racing finals.

The St. Cloud native finished third in the first semi-finals race, but crashed her bike in the last two races. There was speculation of injury after Post's second fall as Post needed help crossing the finish line.

The top four riders in each heat will race for the gold medal.

Prior to today's races, Post was seeded 8th