Blackstock has passed away following a secret three-year battle with cancer, a family spokesperson revealed in a statement.

"It is with great sadness that we share the news that Brandon Blackstock has passed away," the statement read.Start the day smarter. Get all the news you need in your inbox each morning. The news comes one day after Clarkson,

Brandon Blackstock learned of his cancer diagnosis following his divorce from Kelly Clarkson. A source tells PEOPLE that Blackstock, who died on Aug. 7 at age 48, that "he was diagnosed after the divorce." Blackstock and Clarkson, 43, were married in 2013 and welcomed their daughter, River, now 11, and son, Remington, now 9.