How to say "unknown, it is not known" in Russian?

Неизвестно

"unknown, it is not known" is Неизвестно in Russian.

Неизвестно means "unknown, it is not known" in English.

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Word #3035 of 4,000 by frequency in Russian — level B2.

Example

Пока неизвестно, кто выиграл конкурс.

It is still unknown who won the contest.