Mountain bike site 'compromised'
Google placed a warning above the website's url
A website for a major mountain bike championships has been "compromised" by being linked to harmful software.
Google warned that a portion of fortwilliamworldcup.co.uk contained "badware", or violated its guidelines in some other way.
A spokeswoman for the world cup's organisers said it was aware of the problem and was seeking to resolve it.
The event, held earlier this month, attracted more than 18,000 people over three days.
The organisers believe the problem has only just started.
Search engine AlltheWeb.com shows the site linking to an online pharmacy offering Tamiflu, an anti-viral drug.
Google has put a warning about the official website on its search page.
The search engine has placed a further message on StopBadware.org, a site that aims to protect internet and computer users from the threats to privacy and security that are caused by bad software.
The StopBadware site carries the warning: "Google has found that some portion of fortwilliamworldcup.co.uk/ contains or links to badware or otherwise violates Google's software guidelines.
"Some websites intentionally distribute harmful software, while many others have been compromised without the knowledge or permission of their owners."
Hundreds of riders gathered in Fort William for the UCI Mountain Bike World Cup on 6-7 June.
The competition was one of 12 World Cup events taking place in Europe, South Africa, Canada and Australia, between April and September.
About 300 cyclists from a total of 35 countries, competing as individuals, for factory teams or for their national teams, are taking part.