Brisbane hooker and Queensland incumbent Andrew McCullough has gone down at training on Monday morning with what could be a serious knee injury.
According to Seven News Brisbane's Chris Garry, McCullough was carried off the ground at training with a knee injury, while "looks bad" according to Garry.
With the State of Origin series set to begin in less than a month, Maroons selectors will be waiting on the edge of their seats for official news from the Broncos.
McCullough played all three Origin matches for Queensland in 2018.
In other news from the Broncos' session on Monday, Nine News Brisbane reporter Adam Jackson believes James Roberts and Jamayne Isaako are set to be dropped to the reserves, with Gehamat Shibasaki and Kotoni Staggs training in their place with the first grade side.