A spokeswoman for the actor says Sinise was a passenger in a car involved in an accident Friday. Staci Wolfe did not offer details about the extent of his injuries.
The 57-year-old Sinise was to perform with his band at a fundraising event last weekend in Martinsville, Va., and next week in Palm Desert, Calif.
The Martinsville concert will be rescheduled. The Palm Desert performance has been canceled.