RIO DE JANEIRO (AP) - A bomb squad is investigating after an apparent blast shook the area near the finish line of the men's cycling road race.
Reporters could hear a loud boom on the press tribune and felt the ground shake as the cyclists had about 70 kilometers to go Saturday.
No one was injured, and the event went on unaffected.
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 were cordoning off the area.
There is heavy security all over the city amid concerns about safety as the Olympics begin.
There have been several bomb scares in the city the last couple weeks. A few blocks of the high end neighborhood of Leblon were shut down two weeks ago when a doorman reported a suspicious package in front of a building. A bomb squad came out and found that the sports bag only contained clothes.