Photo/Illutration A U.S. F-15 fighter trails a Russian TU-95 bomber over Icelandic airspace in this June 25, 1999, U.S. Air Force photo. (U.S. Air Force via REUTERS)

MOSCOW--Two Russian Tu-95 strategic bombers conducted a routine flight over the Sea of Okhotsk and the Sea of Japan, state-run TASS news agency reported on Thursday, citing the Russian Defense Ministry.

The flight, which lasted for more than eight hours, saw the Russian aircraft being escorted by planes from other countries at certain stages, the ministry said.

Strategic bomber planes, which form part of Russia's nuclear deterrent, have made flights in recent months over the Black and Baltic Seas and in the Arctic.