Unless someone comes forward with physical evidence, the verdict will be heart failure from an undetermined cause.

Ashton Doyne is a successful writer who died from undetermined causes.

Six died of natural causes and five of undetermined causes.

During 1950, the 121st had lost four Thunderjets in accidents, and two more to undetermined other causes.

Lance died suddenly of undetermined causes in April 1994.

For an undetermined cause, they did not reside in that house for long.

Andrade died from undetermined natural causes on 2 March 1996.

Died in her sleep of undetermined cause.

An unknown share of an additional 3 percent of cases with undetermined causes may have spread through heterosexual intercourse as well.

Without warning and from some undetermined cause, the stiff fabric went up in flames.