A plane crash-landed in South Sudan shortly after taking off from the airport in the capital, a South Sudanese radio station reported.
A witness said they could see at least 40 bodies at the crash site, although a police officer and local media said there were 10 casualties. The South Sudan Tribune, a local media outlet, said two people survived, one of them a child.
The aircraft is believed to be an Antonov cargo plane with five Russian crew and seven passengers.
They added that they could see the plane as it lay across the White Nile River, where it came to rest after coming down.
The news comes just a few days after a Russian airliner came down over the Sinai desert in Egypt, killing 224 people, mostly holidaymakers.
A radio station reported the crash on Twitter, saying it happened about 800 metres from Juba airport.
A police officer near the scene, who did not give his name, said there were two survivors but could not say how many people were on board or give further details.
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