This decision proved to be a disaster, and several Typhoons were lost to mysterious causes.

Gee, wonder what the "mysterious" cause of Amy's blackout was, huh?

After her father dies of mysterious causes, her mother remarries a man 10 years younger.

When her agent suggested that she write a book about a woman whose nine children died of mysterious causes, she threw herself into it.

I mean, people reproduce all the time, right, and few seem to die of mysterious natural causes.

That surrounding barrier was also protected by an alarm, which, through some mysterious cause, had not sounded.

What, indeed, did doctors know about the mysterious causes of disease?

Along with these, smaller rackets had collapsed; and in almost every case, some mysterious, unknown cause seemed present.

Some believe that this was not a suicide, but that he died from mysterious causes.

He died of mysterious causes in Chattanooga two years later.