Charlton staff have been ordered not to let chairman Matt Southall into the stadium or training ground after police were called into his escalating feud with majority shareholder Tahnoon Nimer.
Officers attended the Valley on Thursday night following reports of 'threatening behaviour' after Southall ignored two requests to leave club premises.
The duo have been locked in a bitter public power struggle after Nimer accused Southall of using club money to fund his luxury lifestyle, including the renting of a £12,500-per-week London flat, purchase of four Range Rovers for himself and fellow directors and payment of large consultancy fees.
Having refused to budge after being told by Nimer to step down as chairman, the Syrian businessman has now stepped up his attempts to force his rival out of the club.
Both Nimer and then security asked Southall to leave the ground, along with fellow director Jonathan Heller, and when he refused the police were then called to the scene.
The Metropolitan Police said in a statement: 'Police were called at approximately 18:30hrs on Thursday, 12 March following reports of threatening behaviour at Charlton Athletic Football Club. 'Officers attended and spoke to all parties present but no offences were apparent. No arrests were made.'
Southall has now also been banned from all Charlton premises, with staff under strict instructions to deny him access if he attempts to enter.
Nimer, who owns 65 per cent of the Championship south London club, has also sent Southall a further legal letter today repeating his demand that he steps down.
Nimer is determined to wrestle control of the club and is also planning moves over the next week to reconfigure the club's hierarchy and remove a number of other directors along with Southall, leaving those he brought with him to the club vulnerable.