Fire breaks out at Rio de Janeiro Olympic Park

A fire has broken out at Rio de Janeiro's Olympic Park velodrome, prompting a major emergency response involving about 80 firefighters and 20 vehicles, authorities say.

Rio state military fire department said the blaze was under control and largely confined to the venue's fabric roof.

There have been no reported injuries, and the interior of the building - including the Olympic Museum - remained untouched.

While the cause of this latest incident is currently under investigation, the facility has a history of roof fires.

Two similar blazes occurred in 2017, both caused by falling paper sky lanterns.

Since hosting track cycling during the 2016 Summer Games, the Velodrome has served as a primary training base for Brazil's cycling and weightlifting teams.