"They must be held accountable"

15-year-old Russian figure skating star Kamila Valieva tested positive for doping - the illicit heart drug trimethazidine was discovered in a test from December.

But the answers lingered after the team competition at the Olympics in Beijing, where the Russian team won gold.

The case ended up with Cas, the sports arbitration court, which despite doping suspicions allows Valieva to continue competing at the Olympics.

"Today's best decision," says the Russian Olympic Committee.

But the US Olympic Committee does not agree.

"This seems to be a new chapter in the systematic and far-reaching violation of pure sports in Russia," said Sarah Hirschland, President of the US Olympic Committee, in a statement.

"Permanent damage"

Even Tara Lipinski, the American who won individual Olympic gold in Nagano in 1998, questions Cas's message that allows 15-year-old Valieva to continue competing in the Olympic Games, where the short program awaits next Thursday.

"There is still a positive test and in my opinion she would not be allowed to compete, regardless of age or when the test result came.

I think this gives our sport a permanent damage ", Lipinski writes on social media.

"The whole system falls"

Åke Andrén-Sandberg - chairman of the Doping Commission, Swedish Anti-Doping - thinks that those in Valieva's environment should be held accountable for the incident.

- In this particular case, we do not know the details, but we can imagine that she has not had any knowledge of what it is, but there are actually some others who were behind it all.

They are the ones who will be responsible more than she as a person, says Åke Andrén-Sandberg to SVT Sport.

How do you view Cas's decision?

- We have to be a little careful not to say too much about it.

It may sound strange to us because it shows that she actually had this substance in her urine shortly after Christmas.

At the same time, we do not know what Cas has based it all on.

Cas is the highest court and if we do not believe in them, then the whole system falls.

Trimethazidine detected in the test - how can it improve performance?

- I think it is very unlikely that it does anything at all, it has shown in experimental animals that it has a certain effect on metabolism.

It is almost in the same class as meldonium which was famous a few years ago (including the Swedish athlete Abeba Aregawi).

It is easy to detect in doping tests and I do not think she has any use for it.