Police are investigating death threats made to the Reading players involved in incidents in which Chelsea goalkeepers Petr Cech and Carlo Cudicini were injured.
Ibrahima Sonko and Stephen Hunt have received a series of letters at the club's Arborfield training ground.
Thames Valley Police have confirmed that the issue is being investigated with the club's co-operation.
Cech faces a long spell on the sidelines as he recovers from a fractured skull while Cudicini returned to action for the Blues last week.
