Anton Ferdinand has received a bullet in the post ahead of Saturday's FA Cup tie between QPR and Chelsea.
The incident happened less than 24 hours before the already highly charged fixture which kicks-off at midday on Saturday.
The package is believed to have contained a death threat and shotgun cartridge.
Police have confirmed they are investigating the incident.
Wow there are some seriously awful Chelsea fans out there what with this and all the racist chanting after Norwich away.