The European champions announced police had been informed after it emerged some of their academy players had possessions stolen from their dressing room earlier this month.
A Chelsea spokesman said: �A number of personal items were recently stolen from the academy dressing room area. �The matter is currently being investigated by the police. �CCTV footage is being handed to them and confirms the thefts were carried out by a lone intruder not connected with the training ground site.
�Other local premises near to the training ground were targeted that day and may be connected. �Nobody at Chelsea FC is under suspicion.�
Reported to be among the items stolen were six wallets, nine mobile phones and several watches. The theft is the latest incident at Chelsea�s training ground to hit the headlines in the last year.
A knife was found in their academy dressing room earlier this year, the Blues claiming it had been mislaid by a workman. Academy player Jacob Mellis also left the club after letting off a smoke bomb at the training ground.