Piper Perabo Injured in Accident on TV Show Set

8/19/2010 8:39 PM PDT

Piper Perabo Injured -- Accident on Set of 'Covert Affairs'

TMZ has learned actress Piper Perabo was injured yesterday in an accident on the Toronto set of her TV show "Covert Affairs."

Reps from the USA Network tell TMZ Perabo sustained an injury to one of her knees. We're told she's being treated and should make a full recovery.