Leeds United's victory over Barnsley was marred by ugly scenes as fans clashed during a heated Yorkshire derby.
Police were called in to intervene as Leeds supporters spilled out into home sections of the stadium before inflicting violence upon opposing fans.
The trouble commenced shortly after Marcelo Bielsa's side opened the scoring in the 84th minute through Arsenal loanee Eddie Nketiah.
Barnsley stewards are said to have been caught in the crossfire, with Leeds fans allegedly throwing punches their way.
Leeds went on to double their lead and secure the win via a late Mateusz Klich penalty, but the violence raged on long after the final whistle.
In a video posted on Twitter, police officers are seen streaming towards a section of a home stand to attend to violent scenes, with a pair of supporters strewn over advertising hoardings during the ugly scenes.
The video also shows fans throwing wild punches as the violence got out of hand on Sunday afternoon.
Other images show one Leeds fan being apprehended by police officers while another scuffles with ground staff at Oakwell.
Shortly after the game Leeds manager Marcelo Bielsea gave his thoughts on the ugly end to the game.
He said: 'I feel pity that something like that happened, but I didn't see it.'
Although no statement has yet been made by South Yorkshire Police, it is believed that the violence started after Leeds fans were sat in the home end of the ground.