Five Russian airliners sound mid-flight alarms

Five passenger planes sounded alarms while flying over the Russian territory, aviation services told TASS, according to Report.

"The Cherepovets-Moscow, Samara-St. Petersburg, and Petrozavodsk-Moscow flights set the General Alert transponder code while in flight," the agency’s interlocutor said.

After that, according to him, alarm signals were also given by Sabetta-Moscow and Petrozavodsk-St. Petersburg flights.