A CNN workforce witnessed the switch within the Zaporizhzhia area on Wednesday.
The American is 24-year-old Joshua Jones, who was killed in August.
The US State Division has knowledgeable Jones' household concerning the physique's return, Jones' father Jeff Jones instructed CNN on Wednesday.
The switch befell simply north of Vasylivka, within the Zaporizhzhia area, between Ukrainian and Russian-controlled Ukraine.
The 2 sides had agreed to a two-hour ceasefire in no-man's land between Russian and Ukrainian-held Ukraine.
A Ukrainian ambulance was on web site to move Jones' physique.
The Ukrainians mentioned that they have been in a position to establish the physique by Jones' tattoos and different figuring out traits.
The Russians had additionally despatched images of the physique upfront.
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Ukraine launched a Russian soldier on Wednesday as half of a bigger swap, during which 10 Ukrainians have been already freed.
In a tearful cellphone name Jeff Jones instructed CNN: "We bought him again!"
"I can not let you know what a burden is lifted off this household," Jones. "I could not surrender that hope."
Jones mentioned he bought a message from the Worldwide Legion on Wednesday morning at 6:30am through the Sign app.
He mentioned he missed it.
At 7am he bought a name from his son's fiancée with the information.
A bit of later the US Embassy in Kyiv referred to as him and verified the return.
On Wednesday, US State Division spokesperson Ned Worth expressed his condolences to Jones' household in an announcement, saying the "United States is appreciative of Ukraine for together with restoration of this particular person's stays in its negotiations with Russia."
He added that the stays "will quickly be returned to the household."
Jones' stays have been discovered within the so-called Donetsk Individuals's Republic (DPR), a Russian-backed, self-declared republic that has ruled a breakaway portion of Ukraine's Donetsk area since 2014.
DPR officers mentioned in August that Jones' physique had been transferred to a mortuary within the area, and that they have been prepared to debate a switch of his stays.
Jones turned certainly one of a lot of People who've been captured or killed in Ukraine for the reason that outbreak of conflict in February.
Stephen Zabierslki was killed in Might and Marine Corps veteran Willy Cancel was killed in April.
In July, the State Division mentioned two Americans have been killed in Donbas.
Two American veterans, Andy Tai Ngoc Huynh and Alexander John-Robert Drueke, have been captured in June whereas combating for Ukraine in a battle close to Kharkiv.
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The pair have been launched final month as a part of a prisoner swap between Russia and Ukraine that was brokered by Saudi Arabia.
And CNN has beforehand reported that a third American, US Marine veteran Grady Kurpasi, went lacking in motion in June.
Russia is the one nation that considers the DPR impartial.
The worldwide neighborhood doesn't recognise the area and its establishments, and considers the territory to be a part of Ukraine.
Impartial watchdog teams have lengthy accused the separatists of a dismal human-rights observe file and ill-treatment of prisoners.