Russia deployed the drones in late 2014 and performed tests earlier this year of their survival in Arctic conditions.
Putin says the move is a response to a U.S. proposal to increase its military presence in Eastern Europe.
In the face of Russian hostility, the U.S. may base the advanced stealth fighter in Poland.
The deal comes just months after Russia purportedly reached a similar collaborative agreement with Iran.
Russia's Barents Sea military exercises reminded observers Moscow sits next to the energy-rich Arctic and demonstrates its capabilities in harsh environments.
Later this week, officials will offer a private demonstration of the "microwave gun" that reportedly can disable drones and warheads.
Russia will boost its military presence in Belarus and Kaliningrad if the U.S. places troops and heavy weapons in Eastern Europe.
Finland President Sauli Niinisto was reportedly "indignant" when asked about criticism of his ties to Russia amid the Kremlin's recent aggression.
An Agence France-Presse reporter was shot in the leg in the Ukrainian city of Donetsk and is recovering in a hospital.
For the first time since the end of the Cold War, the U.S. could begin piling up heavy weapons and troops in Eastern Europe, as a bulwark against Russia.
Officials from both the U.S. and Russian navies held talks to discuss ways to avoid unintentional clashes that could lead to war.
Macedonia and Montenegro should be invited to join NATO, says Poland's defense minister, but Russia is opposed.
Military officials declined to state where the exercises where taking place, but called the drills routine.
The children were spotted at a rebel roadblock near the contested village of Shyrokyne, 10 miles from the Ukraine-held port town of Mariupol.
The comments by the U.S. envoy to the United Nations are considered to be one of Washington’s toughest rebukes to Moscow in recent times.
Malaysia Airlines Flight MH148, an Airbus A330 twin-engine jet, dumped fuel before safely landing at Melbourne's Tullamarine Airport on Friday.
Sen. Bill Nelson said during a speech on the Senate floor, "We need to wake up to what's happening."
The exercise will take place in August in the Sea of Japan, a move that is likely to add to the already fragile state in the region.
The diplomatic tone of Francis' entreaties will not be likely to please observers hoping for a more forceful stance from the Vatican.
Pope Francis was the second world leader Putin kept waiting for an hour on Wednesday.
The rise in fighting and deaths has convinced Congress, long inclined to supply weapons to Ukraine, that the country still needs more assistance.
Russia and Egypt's joint naval drills in the Mediterranean underscore the countries' cooling relations with the United States.
