A sweeping cyberattack has forced hundreds of pharmacies across Russia—primarily in Moscow—to shut down, per reports. The breach comes just one day after a massive hack crippled Aeroflot, Russia's largest airline,

Russian prosecutors on Monday opened a criminal investigation into unauthorised access to computer systems at Aeroflot , the Prosecutor General's office said, after the airline blamed an IT failure for the cancellation of dozens of flights.

Responsibility for the cyberattack was claimed by a Ukrainian hacker group called Silent Crow along with a Belarusian hacker activist group known as the Cyber-Partisans.