Russian's state nuclear company says five people were killed in Thursday's rocket explosion on a naval test range.
A statement from Rosatom said three people were also injured in the incident.
They say the staff members suffered serious burns in the accident, which has been shrouded by mystery.
On Friday Russian government sources said two people died and six were injured in the Nyonoksa blast.
Netanyahu orders deeper Israeli incursion into Lebanon
Israeli Prime Minister Benjamin Netanyahu said on Sunday he had ordered troops to move further into Lebanon in the battle against Hezbollah, despite a ceasefire announced more than six weeks ago.
Blast in Myanmar village reportedly kills 55 and injures dozens more
At least 55 people were reportedly killed in a blast in Myanmar's Kaung Tat village, which a rebel army said was caused by the accidental explosion of material stored for use in mining.
US military says it turned away blockade runner trying to reach Iranian port
The US military has announced that it fired a missile into the engine room of a vessel trying to get through the US blockade of Iran on Friday.
Two hundred hurt in post-game violence as Paris hails second Champions League triumph
More than 200 people were injured and one person died in Paris following Paris Saint-Germain's second consecutive Champions League win, the interior ministry said on Sunday, reviving France's heated debate about street violence.
Illegal mine collapses in China, killing five just days after Shanxi disaster
A mine shaft collapse during an illegal mining operation in China's southwestern Yunnan province killed five people and injured one, state media reported, days after the country's deadliest mining accident since 2009 left at least 82 dead.
