Investigations underway post suspected blast at Rio Games

Investigations are underway after a suspected explosion near the finish line of the men's cycling race track at the Rio Olympics on Saturday.

Reporters could hear a loud noise on the press tribune and felt the ground shake as the cyclists had about 70km to go, reports the Guardian.

Eyewitnesses have confirmed that a controlled explosion took place near the finish line of the road cycling race.

An official said they were suddenly moved out of the way for the bomb disposal squad. One of the officers present there told the bystanders that the detonation was simply a precaution.

The item which caused concern is believed to be a small bag.

Meanwhile, half a dozen military police cordoned off the area.

No one was immediately evacuated, and no injuries have been reported so far.

The race continued even after the explosion and was not rerouted.

"The security services found a suspicious package close to the cycle road race finish line in Copacabana and as a precaution decided to perform a controlled explosion. There is no impact to the race, which is ongoing," said a Rio 2016 spokesman.