The Pittsburgh Steelers training camp descended into chaos on Thursday afternoon after two of their stars fought each other - on multiple occasions. 

As preparations for the new season continue to get underway, most fans would hope to see their teams learning the styles of one another and building team chemistry.

However, for the Steelers, it appears that the opposite has occurred after tight end Jonnu Smith and safety Juan Thornhill were seen brawling - twice - at training. 

Ugly footage of the scuffles made their way onto social media shortly afterwards, however it remains unclear what order the events happened in. 

In one clip, Smith was seen beating Thornhill during a 1-vs-1 at the training camp, before throwing the ball at his teammate - which he clearly didn't appreciate. 

Thornhill quickly got back to his feet and charged at Smith before the two players grabbed hold of one another. Teammates and staff rushed on pitch to break it up. 

However, before they could do so, Smith ripped the helmet off his teammate in shocking scenes that left fans in attendance stunned.  

Later in the evening, another video from the camp emerged which showed Thornhill getting the better of Smith - before pushing the ball into the tight end's chest.

As the pair walked back, a few words were exchanged before the duo began lightly shoving each other. Eventually, Smith lunged at Thornhill and appeared to throw a punch.

Once again, the two Steelers stars were locked in a scuffle but, this time, there were a number of teammates stood close by who were able to break it up. 

Both players only recently joined the Steelers - with Thornhill landing a one-year deal with the franchise back in March and Smith joining in June as part of a trade.

Along with the aforementioned duo, the Steelers also brought in veteran quarterback Aaron Rodgers, who will be hoping to make an impact with the side. 

Rodgers, 41, is gearing up for his first season with the Steelers after signing a one-year, $13.65million deal in Pittsburgh on the back of his New York Jets release.

This campaign may well mark Rodgers' last in the NFL after more than two decades, meaning he will want to go out with a bang.

However, his opening practice with Pittsburgh did not get off to the best start after he threw an interception with his very first pass.

'It's good to get that out the way,' Rodgers later said with a grin.