The exact cause of the fire is not yet known.

"We don't need to know the exact cause of the pain to try to make it feel better."

The exact cause and the place of death were not announced.

This can make it hard to know the exact cause of the pain.

She said the exact cause of death had not yet been determined.

Even today the exact cause of the disease is not fully known.

The exact cause of death was not given in these early reports.

In most cases, doctors can't point to the exact cause.

"Nothing more to add about the exact cause of death."

The exact cause of the fire has never been found.