Frank Sinatra Jr. Passes Away at 72

Frank Sinatra Jr., who carried on his famous father's legacy with his own music career, has died. He was 72.

The Sinatra family said in a statement to The Associated Press that Sinatra died unexpectedly Wednesday, March 16, 2016 of cardiac arrest while on tour in Daytona Beach, Florida.

The statement said the family mourns the untimely passing of their son, brother, father and uncle. No other details were provided.

Kidnapped and held for ransom when he was 19, Sinatra Jr. had already followed his dad into the music business by then.

Sinatra Jr. performed the National Anthem at a New York Yankees game last year.

Fans and celebrities took to Twitter to react to Sinatra's death.

For a time, Sinatra Jr. was his father's musical director. In 2015, on what would have been his father's 100th birthday, he described his father's voice to "Sunday Morning" correspondent Mo Rocca as "truth.... When Sinatra sang, you believed him."