Two fighters from UFC 168 have had issues with their post-fight drug tests. Siyar Bahadurzada and Denis Siver are the fighters in question.
Shaun Al-Shatti from MMA Fighting with the tweet:
It's important to note that "inconclusive" is not a failure. There are a number of factors that could result in an inconclusive return, from lab error to diluted samples. The fact that there are multiple fighters with inconclusive results does tend to make me think that it could just be lab error.
The thing that does stick out as a little strange is that B-samples would generally return exactly the same if inconclusive. It could very well be that the test results were "abnormal" as opposed to "inconclusive," thus the running of the B-Sample.
Either way, if either B-sample comes back as positive, we will bring you updates at that time.