Salford Red Devils have confirmed two players have tested positive for COVID-19.
The club have undergone two rounds of testing since their last Super League match against Huddersfield Giants.
Two have tested positive, while a further two provided inconclusive tests. All four will self-isolate.
A further eight players are ruled put for the Red Devils with injury. Despite this, their game against Hull KR will go ahead.
Kick off was delayed until 3pm.