Olympics cycling area blast a controlled explosion, police say

A small blast shook the area near the finish line of the men's cycling road race Saturday with about 70 kilometers to go in the race. No one was injured, and the event went on unaffected.Reporters heard a loud boom on the press tribune and felt the ground shake.An officer assigned to the event said it was a controlled explosion of an unattended bag. He did not give his name because he was not authorized to speak.A half-dozen military police cordoned off the area. No one was immediately evacuated