The Football Association will investigate the shameful scenes at Swindon on Saturday when a fan ran onto the pitch and attacked Leyton Orient goalkeeper Jamie Jones.
A 26-year-old man was arrested after appearing to throw three punches at Jones during the second half of Orient's 3-1 victory in the Sky Bet League One match at the County Ground.
Jones, 24, was thankfully unhurt and able to finish the match while the fan is facing a lifetime ban.
Orient's chief executive Matt Porter wrote on Twitter: "Swindon confirm fan who ran on pitch and attacked Jamie was arrested and will be banned for life. We will also press for strongest penalty."
The FA will speak to officials from both Swindon and Orient before deciding on whether to take any action.
A spokesman said: "We deplore scenes of this kind and would call for the authorities to take the appropriate actions if allegations of assault are proven.
"We will be speaking to both clubs involved to determine the facts surrounding the incident."
The spokesman also confirmed the FA would push for a banning order from all grounds.
On Saturday evening Wiltshire Police confirmed: "A 26-year-old man from Swindon was arrested at the County Ground during the Swindon Town game against Leyton Orient.
"He was arrested on suspicion of pitch invasion and remains in custody at Gablecross Police Station, Swindon, at this stage.
"Police enquiries are ongoing. It would be inappropriate to comment further at this stage."
Jones, meanwhile, made no mention of the incident in his Twitter page, although he did reveal he had some of his team-mates round on Saturday evening - to watch the boxing.