RIO DE JANEIRO (AP) — A fire broke out Wednesday morning at Rio de Janeiro’s Olympic Park velodrome, prompting a major emergency response involving about 80 firefighters and 20 vehicles, authorities said.

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.

Rio Mayor Eduardo Cavaliere told journalists that a small portion of the city’s 1,000-item Olympic museum, which lies inside the velodrome, was affected but that it could be fixed with only minor repairs.

“The structure of the velodrome itself is preserved and the track has not been hit at all,” Cavaliere said.

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 national cycling and weightlifting teams.

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