Chelsea Football Club is appealing for witnesses regarding the reported incident on public transport in Paris yesterday (Tuesday).

To help us with our investigations and to identify those persons involved, we ask those who were present to forward their observations, in the strictest confidence, to customer.services@chelseafc.com

The club has released the following statement regarding the reported incident:

'Such behaviour is abhorrent and has no place in football or society. We will support any criminal action against those involved in such behaviour, and should evidence point to the involvement of Chelsea season ticket holders or members the club will take the strongest possible action against them including banning orders.'