Hacker wars: Rival Russian and Ukrainian cyber groups claim credit for attacks on each country's air raid systems that saw some civilians alerted to fake nuclear and chemical warfare

The bogus alarms went to millions of people across Russia and Ukraine in an apparent tit-for-tat exchange by two groups.

يعرض MarketNews العنوان والملخص كما نشرتهما الوسيلة الإعلامية. المقال الكامل متوفر على موقع الناشر. (www.dailymail.com)