The authorities in Austria raided the headquarters of biathlon’s global governing body following a tip from the World Anti-Doping Agency that its leaders may have been involved with the vast Russian doping scandal that continues to roil international sports.

The Salzburg-based International Biathlon Union, which has long had close links to Russian sports, confirmed the investigation in a news release on Wednesday, in which it also announced that its longtime secretary general, Nicole Resch, had requested a leave of absence. The I.B.U. said the investigation focused on Resch — who had publicly questioned sports regulators’ conclusions about Russia’s systematic cheating — and the group’s president, Anders Besseberg, a former biathlete and cross-country skier who is also a board member of the antidoping agency.

The raid escalates the Russian doping scandal at a time when sports officials have tried to put it in the rearview mirror. Investigators have established that huge amounts of corruption within Russia’s system tainted track and field. The raid in Austria signals that the investigation has extended to other sports’ governing bodies and could raise additional questions about possible bribery in other federations.

Biathlon had been at the center of a number of allegations related to Russian doping years before the 2016 revelations of a state-sponsored scheme that corrupted dozens of sporting events, including to the 2014 Winter Olympics in Sochi, Russia.