The Comissao Atletica Brasileira de MMA (CABMMA) – the Brazilian MMA Commission – has announced that all its UFC Fight Night 61 drug tests came back clean.

MMAjunkie received a prepared statement from the UFC-backed commission stating all fighters were tested for performance-enhancers and drugs of abuse during this past month’s event.

Additionally, six randomly chosen fighters were tested for erythropoietin (EPO). All tests were negative, though the athletes weren’t identified.

UFC Fight Night 61 took place Feb. 22 at Gigantinho Gymnasium in Porto Alegre, Rio Grande do Sul, Brazil. The majority of the card aired on FOX Sports 1 following early prelims on UFC Fight Pass.

In the headliner, former heavyweight champ Frank Mir snapped his four-fight losing skid with a first-round knockout of Antonio Silva (watch the Mir vs. Silva video highlights).

For more on UFC Fight Night 61, check out the UFC Events section of the site.