Marianna Budanova, whose husband is the director of military intelligence, is recovering in a hospital, the officials said. Her husband has long accused Russia of trying to kill him.
Officials in Ukraine rarely discuss attacks on targets inside Russia, including Moscow. But video evidence shows an increasing effort to launch long-range strikes inside the country.
Yevgeny V. Prigozhin, the founder of the private military group, dismissed a report from The Washington Post saying that leaked intelligence showed he had offered to share Russian army positions with Ukraine.