Derby County have released a statement revealing that the man responsible for stopping the team's training session was from Leeds United.
"Derby County Football Club can confirm that officers from the Derbyshire Constabulary were called to the Derby County Training Centre at around 11:20am on Thursday 10th January 2019 following reports of a man acting suspiciously outside the premises," reads the statement.
"It has since been confirmed to Derby County that the individual concerned is an employee of the footballing staff at Leeds United Football Club.
"The club is now in discussion with Leeds United club officials in relation to this incident.
"At this time no further comment will be made."
Early reports suggested that police had arrived on the scene to apprehend the man who was spying on the team's training session.
He was found to have a pair of pliers, a spare set of clothes and a pair of binoculars on him.
Frank Lampard's side will face Leeds at Elland Road today.
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