The Football Association are investigating an incident in which Hartlepool United fans confronted a Macclesfield player during Tuesday night's game at Victoria Park.
Two Pools supporters were allowed onto the pitch to confront goalkeeper Tommy Lee after a late own goal which meant the home team won 3-2.
An FA spokesman said: "The referee mentioned in his report an incident concerning supporters entering the field of play and confronting a Macclesfield player.
"We have written to Hartlepool to ask for an explanation and they have seven days to respond.
"We have also contacted the local police and will be trying to ascertain how the situation was dealt with and what the club will be doing to prevent such an incident taking place in the future."
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