A Ukrainian official says the country’s hackers carried out a cyberattack that took down the online broadcasts of 20+ Russian broadcasters, including Rossiya 24 (Olesia Safronova/Bloomberg)

Olesia Safronova / Bloomberg:
A Ukrainian official says the country's hackers carried out a cyberattack that took down the online broadcasts of 20+ Russian broadcasters, including Rossiya 24  —  - Russian state media reported ‘unprecedented’ cyberattack  — Disruption coincided with Russian president's 72nd birthday