A supporter has been arrested after confronting Arsenal manager Arsene Wenger as his side crashed to a 2-0 defeat at Southampton.
The fan ran with his arms outstretched in front of the Gunners' boss as he sat in the dugout late on in the game at St Mary's.
Footage showed the man being bundled away down the tunnel by two stewards as Wenger held his arm out in apparent frustration at the intruder.
The incident capped a miserable visit to the south coast for Arsenal whose goalkeeper, Wojciech Szczesny, gifted the Saints victory with two howlers.
Wenger sat fuming on the bench, shaking his head sullenly in reaction to Szczesny's loose errors which gifted Southampton their win.
It was unclear whether the fan who ran in front of the Arsenal manager was a Gunners or Saints supporter.
Police said a 25-year-old man was arrested on suspicion of "going into an area adjacent to the playing area contrary to the Football (Offences) Act 1991".
The suspect, from Lymington, Hampshire, was still being questioned tonight by Hampshire Constabulary officers.
A Hampshire Police spokesman said: "Police have arrested a 25-year-old man from Lymington following an incident on the pitch at St Mary's at the end of the Southampton versus Arsenal match.
"The man was arrested on suspicion of going in to an area adjacent to the playing area contrary to the Football (Offences) Act 1991.
"The man remains in police custody. Officers are investigating the circumstances to establish whether any criminal offences have been committed."
Asked about the incident post-match, Wenger said: "There was a young boy, yes. I think he was a Southampton fan. He was not aggressive at all. I don't think he said anything. Honestly, he was not aggressive at all."
To their credit, Reading continued to look for a way back into the match after the home side went 3-0 up, Laurent Koscielny needed to make a last-ditch tackle on Pogrebnyak.
Arsenal switched off, which allowed Reading to pull a goal back as Jobi McAnuff floated cross from the left was headed in at the far post by Robson-Kanu with full back Nacho Monreal clattering into the woodwork,
Ivory Coast international Gervinho, such a frustrating figure for the Gunners, set the hosts on their way after 11 minutes.
However, despite dominating possession, it was not until the start of the second half where the crucial breakthrough came again, this time Santi Cazorla sweeping home.
Olivier Giroud added a third following a quick break by Gervinho. Reading - who squandered a 4-0 lead against** **Arsenal in their home Capital One Cup tie earlier this season - started positively, as Mikele Leigertwood headed wide from a corner.