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.
12 killed, 10 injured in Polish bus crash in Hungary
Twelve people have been killed and at least 10 injured after a Polish bus overturned at night on a motorway in eastern Hungary, Hungarian Prime Minister Peter Magyar said on Sunday morning in a Facebook post.
Thousands evacuate after Indonesia quake kills 53
Around 5,000 people have been evacuated after a magnitude-7.7 earthquake rocked eastern Indonesia, killing at least 53, blocking roads and causing landslides, authorities said on Sunday.
Pope calls for an end to West Bank violence against Palestinians
Pope Leo called on Sunday for an end to violence against Palestinians in the occupied West Bank, amid a surge of attacks by militant settlers and a siege in the territory's village of Qusra.
Russia hits steel plant in new strikes on Ukraine, Kyiv attacks Moscow region
Russia carried out a wave of airstrikes on Ukraine overnight, killing two people at a steel plant, and Kyiv launched a heavy drone attack on the Moscow region that killed one person and set ablaze a warehouse used by Russia's leading e-commerce retailer.
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