In this grab taken from a footage provided by the Russian State Atomic Energy Corporation ROSATOM press service, a Russian military band prepare to attend the funerals of five Russian nuclear engineers killed by a rocket explosion in Sarov, the closed city, located 370 kilometers (230 miles) east of Moscow, which has served as a base for Russia's nuclear weapons program since the late 1940s, Russia, Monday, Aug. 12, 2019. Russia's Rosatom state nuclear concern said Thursday's explosion at a military testing range in northwestern Russia occurred while the engineers were testing a "nuclear isotope power source" for a rocket engine, a tragedy that fueled radiation fears and raised new questions about a secretive weapons program. (Russian State Atomic Energy Corporation ROSATOM via AP)
Russian State Atomic Energy Corporation/AP
In this grab taken from a footage provided by the Russian State Atomic Energy Corporation ROSATOM press service, a Russian military band prepare to attend the funerals of five Russian nuclear engineers killed by a rocket explosion in Sarov, the closed city, located 370 kilometers (230 miles) east of Moscow, which has served as a base for Russia's nuclear weapons program since the late 1940s, Russia, Monday, Aug. 12, 2019. Russia's Rosatom state nuclear concern said Thursday's explosion at a military testing range in northwestern Russia occurred while the engineers were testing a "nuclear isotope power source" for a rocket engine, a tragedy that fueled radiation fears and raised new questions about a secretive weapons program. (Russian State Atomic Energy Corporation ROSATOM via AP)
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LONDON, UNITED KINGDOM - APRIL 10: The Honourable Artillery Company fire a gun salute at The Tower of London on April 10, 2021 in London, United Kingdom.  The Death Gun Salute will be fired at 1200 marking the death of His Royal Highness, The Prince Philip, Duke of Edinburgh. Across the country and the globe saluting batteries will fire 41 rounds, 1 round at the start of each minute, for 40 minutes. Gun salutes are customarily fired, both on land and at sea, as a sign of respect or welcome. The Chief of the Defence Staff, General Sir Nicholas Carter, said "His Royal Highness has been a great friend, inspiration and role model for the Armed Forces and he will be sorely missed." (Photo by Chris Jackson/Getty Images)
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LONDON, UNITED KINGDOM - APRIL 10: The Honourable Artillery Company fire a gun salute at The Tower of London on April 10, 2021 in London, United Kingdom. The Death Gun Salute will be fired at 1200 marking the death of His Royal Highness, The Prince Philip, Duke of Edinburgh. Across the country and the globe saluting batteries will fire 41 rounds, 1 round at the start of each minute, for 40 minutes. Gun salutes are customarily fired, both on land and at sea, as a sign of respect or welcome. The Chief of the Defence Staff, General Sir Nicholas Carter, said "His Royal Highness has been a great friend, inspiration and role model for the Armed Forces and he will be sorely missed." (Photo by Chris Jackson/Getty Images)
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People view flowers left in front of the gate at Buckingham Palace in London, after the announcement of the death of Britain's Prince Philip, Friday, April 9, 2021. Buckingham Palace officials say Prince Philip, the husband of Queen Elizabeth II, has died. He was 99. Philip spent a month in hospital earlier this year before being released on March 16 to return to Windsor Castle.
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People view flowers left in front of the gate at Buckingham Palace in London, after the announcement of the death of Britain's Prince Philip, Friday, April 9, 2021. Buckingham Palace officials say Prince Philip, the husband of Queen Elizabeth II, has died. He was 99. Philip spent a month in hospital earlier this year before being released on March 16 to return to Windsor Castle.
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Britain's Prince Philip, Duke of Edinburgh, in his role as Captain General, Royal Marines, attends a Parade to mark the finale of the 1664 Global Challenge on the Buckingham Palace Forecourt in central London on August 2, 2017.  
After a lifetime of public service by the side of his wife Queen Elizabeth II, Prince Philip finally retires on August 2, 2017,at the age of 96. The Duke of Edinburgh attended a parade of Royal Marines at Buckingham Palace, the last of 22,219 solo public engagements since she ascended to the throne in 1952.
 / AFP PHOTO / POOL / HANNAH MCKAY        (Photo credit should read HANNAH MCKAY/AFP/Getty Images)
HANNAH MCKAY/AFP/Getty Images
Britain's Prince Philip, Duke of Edinburgh, in his role as Captain General, Royal Marines, attends a Parade to mark the finale of the 1664 Global Challenge on the Buckingham Palace Forecourt in central London on August 2, 2017. After a lifetime of public service by the side of his wife Queen Elizabeth II, Prince Philip finally retires on August 2, 2017,at the age of 96. The Duke of Edinburgh attended a parade of Royal Marines at Buckingham Palace, the last of 22,219 solo public engagements since she ascended to the throne in 1952. / AFP PHOTO / POOL / HANNAH MCKAY (Photo credit should read HANNAH MCKAY/AFP/Getty Images)
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This picture shows the interior of Palais Vivienne apartment, owned by French collector Pierre-Jean Chalencon, on April 5, 2021. - The lawyer of Pierre-Jean Chalencon, owner of the "Palais Vivienne", implicated by a report from French channel M6 for clandestine dinners in Paris, told AFP on April 4th that his client was only "joking" when he declared ministers participated in such meals. Paris prosecutor Remy Heitz opened a criminal investigation on alleged dinners banned during the pandemic. - RESTRICTED TO EDITORIAL USE (Photo by Thomas COEX / AFP) / RESTRICTED TO EDITORIAL USE (Photo by THOMAS COEX/AFP via Getty Images)
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This picture shows the interior of Palais Vivienne apartment, owned by French collector Pierre-Jean Chalencon, on April 5, 2021. - The lawyer of Pierre-Jean Chalencon, owner of the "Palais Vivienne", implicated by a report from French channel M6 for clandestine dinners in Paris, told AFP on April 4th that his client was only "joking" when he declared ministers participated in such meals. Paris prosecutor Remy Heitz opened a criminal investigation on alleged dinners banned during the pandemic. - RESTRICTED TO EDITORIAL USE (Photo by Thomas COEX / AFP) / RESTRICTED TO EDITORIAL USE (Photo by THOMAS COEX/AFP via Getty Images)
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(CNN) —  

Russia launched two ballistic missiles from nuclear-powered submarines in the Arctic Ocean and the Barents Sea on Saturday, according to a tweet from the Russian Ministry of Defense.

Described as a successful test launch, the missiles were part of combat training, the ministry said. Video of the missiles’ launch was also shown in the tweet.

“Nuclear powered submarines Tula and Yuri Dolgoruky launch ballistic missiles Sineva and Bulava from Circumpolar region of the Arctic Ocean and the Barents Sea,” the tweet read.

The ministry said that the launches confirmed the technical properties of the missiles and the performance of all missile systems on submarines.

The launch comes about two weeks after five nuclear specialists were killed in a blast at the Russian secret city of Sarov. An official state of mourning was declared in the city. While it has not been confirmed the explosion was nuclear, authorities in Russia detected a brief rise in radiation levels following an explosion at a military training ground there, Russian state news agency TASS reported.

CNN’s Nathan Hodge, Mike Callahan, Fred Pleitgen and Alla Eshchenko contributed to this report.