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.
Thousands stranded at Japan's Narita airport after record rain kills four
Record rainfall has left thousands of travellers stranded at Tokyo's Narita airport on Friday morning as flooding in the surrounding area disrupted transport, knocked out power to homes and claimed at least four lives.
Air India A320 briefly lost key flight controls during 300-foot drop, Airbus analysis shows
An Air India Airbus that dropped about 300 feet this month, injuring 24 people on board, briefly lost key flight controls after registering losses in all three hydraulic systems, according to a preliminary Airbus analysis reviewed by Reuters.
Three killed, 17 injured in Cairo mall helium cylinder explosion
Three people have been killed and 17 others injured on Thursday following a fire that broke out from a helium cylinder explosion at Arabella Plaza Mall in Egypt's New Cairo.
Blast at Rotterdam port energy facility kills one person
A blast at a storage facility for petroleum products at the Netherlands' Rotterdam port killed one person and wounded six others on Thursday.
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