Six weeks before the Summer Olympics open in Rio de Janeiro, the laboratory that was set to handle drug testing at the Games has been suspended by the World Anti-Doping Agency in a new escalation of the doping crisis in international sports.

WADA — the global regulator of doping in sports that oversees three dozen testing labs around the world — confirmed the suspension Friday, citing the Rio lab’s “nonconformity” with international standards.

The lab has a prior disciplinary record and is one of a handful of labs that have had their certification to conduct drug testing revoked in WADA’s 17-year history. Among those is Moscow’s antidoping lab, which was disciplined last fall following accusations of a government-run doping program in Russia.

Those allegations have prompted global sports officials to bar Russian track and field competitors from the Rio Games. At the urging of Olympic officials, 27 other Summer Olympics sports organizations are scrutinizing athletes from Russia and Kenya, another country facing accusations of widespread doping, ahead of the Games.