The Poseidon’s power significantly exceeds the power of even our most promising Sarmat intercontinental range missile,” Putin said.

The test comes days after President Vladimir V. Putin announced the previous trial of another Russian nuclear weapon.

Russian President Vladimir Putin's special envoy Kirill Dmitriev said on Wednesday during a visit to Saudi Arabia that he expected the war in Ukraine to end within a year.

Russia has conducted a successful test of a new atomic-powered and nuclear-capable underwater drone, President Vladimir Putin said Wednesday, declaring that the new weapon can't be intercepted.

President Vladimir Putin is voicing concern about the ongoing internal problem of “falling birth rates” in his own country and suggesting state action to address the issue.

Vladimir Putin tightens grip on power by promoting family members and younger allies to his inner circle as economic strain and opposition threats mount in Russia.

North Korea's top diplomat has visited the Kremlin for talks with Russian President Vladimir Putin. The meeting follows last month's meeting between Putin and Kim Jong Un in Beijing.

PMDA is a Cold War-era deal committing both nations to the disposal of 34 metric tons of weapons-grade plutonium each—enough for thousands of nuclear warheads. This agreement, signed in 2000 and amended in 2010,