Stags fans are being asked to submit photos or video footage they may have taken of the violence that broke out after their match with Bristol Rovers on Saturday.
Mansfield Town beat Rovers 1-0 at the Memorial Stadium to relegate the Gas to non-league football.
The result led to hundreds of Rovers fans storming the pitch at the final whistle to protest against the club’s directors.
Eye-witnesses in the Mansfield Town section said some of the troublemakers then headed for the away fans before clashing with a line of police.
Avon and Somerset police then deployed their mounted section as they battled to bring the ugly scenes under control.
The violence left three police officers injured, while a police horse was also punched.
Mansfield Town fans were then escorted by police as they left the ground, with one Stags fan on Twitter describing it as ‘like being in the 80s’.
The Mansfield Town team bus also came under attack as it tried to leave the ground later on, with a wing mirror being ripped off.
There were also unconfirmed reports that there were clashes between fans in Bristol city centre.
A 42-year-old man from Nottingham was one of six people arrested on the day. He was charged with possession of a class B drug and has been bailed pending further inquiries.
Fans who have footage of the incidents are being urged to ring the non-emergency number on 101 and ask for Avon and Somerset Police.