The London Evening Standard says Souare is in hospital recovering from injuries sustained in a car accident on Sunday.
Souare was airlifted to hospital after emergency services cut the roof off his car following the collision on the M4 motorway.
"The player has sustained injuries to his thigh and jaw bone and will remain in hospital whilst he receives treatment.
"The club are liaising closely with the hospital on his progress and we obviously wish him a speedy recovery. Our thoughts are with Pape and his family at this time."