The incident of the submarine sunk in the Barents Sea will be thoroughly investigated, Russian President Vladimir Putin, currently on a working visit to Sardinia at the invitation from Italian Prime Minister Silvio Berlusconi, told journalists on Saturday.
"A thorough investigation will be launched," the president stressed.
"The Russian Navy Commander-in-Chief is already there, his plane landed an hour ago. The Russian defence minister will fly there in the evening," Putin reported.
The K-159 submarine sunk in the Barents Sea at 4.00 Moscow time during its towing to an utilisation facility.
Following the missile attack on the Black Sea Fleet headquarters in Crimea, Russia will obliterate airfields in Western Ukraine where Sukhoi Su-24 bombers are stationed