Law and Order star Dennis Farina was fighting cancer when he died Monday, his cardiologist revealed.

It had never been reported that Farina had been diagnosed with cancer, but a 911 call describing the actor as a "cancer patient" was released today by TMZ.

Dr. Marc A. Kates, who was treating Farina, said in a statement, "He had a small cancer 13 years ago that was treated and cured with surgery. Over the last several months, he unfortunately experienced a recurrence of the cancer which was being treated. Despite treatment, over the weekend a blood clot developed in Mr. Farina's lung which unexpectedly and suddenly took his life."

Dennis Farina was 69 when he passed away.