Well, what is the source for this piece of information, I wonder... When I googled it earlier, the oldest hit I got was that daily mail article, which didn't mention as much as an anonymous source, as far as I could see.
i first heard about it from RT.com updates at 13:35 GMT 05/11/15
13:35 GMT
The body of 10-month-old girl Darina Gromova, who became the symbol of the fatal A321 plane crash in Egypt's Sinai Peninsula, has been discovered by rescue teams, TASS news agency has reported.
"Now she is being taken to Cairo, from there she will be sent to St. Petersburg to be identified by the relatives," the head of Russian Emergencies Ministry's operation headquarters in Egypt, Vladimir Svetelsky, said.
so it seems to have come a fairly direct source rather than a Egyptian 'close to the investigation'. No mention of distance was given but as she was only found yesterday it struck me she was in an extended search area so some distance from the main crash site.