Guerrero tested positive on October 5 after the World Cup qualifying match against Argentina, the Peruvian Football Federation added on Friday.
The federation did not disclose the banned substance. If the decision is upheld, Peru will miss its main striker for both World Cup playoff matches against New Zealand this month. Peru and New Zealand meet on November 11 and 16.
The federation said it "believes the facts will soon be clarified and this issue will be permanently solved."
Guerrero, who plays his club football for Flamengo, scored six times in South American qualifiers and led Peru to fifth place.
"If Guerrero has justification for this and that justification was offered before the match against Argentina, it is not a doping case," Fernando Solera told channel SporTV.
Solera also said Flamengo showed evidence that Guerrero did not take any illegal substances during his time with the Brazilian club.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
