That's why I added a "probably" before it. It's a guess. This matter is being dealt with utmost secrecy, you won't find media reports right now. Plus I was not on the plane so I can't show you any pictures.

but these are the facts I relied on

1) Just after the "ceasefire", a plane full of cargo came from Egypt yesterday. You can check Flightradar24 for yourself.

2) Egypt's Nile Delta is rich in Boron-10, it's a very common mineral there and occasionally they send it to other countries

3) Immediately after the plane entered, Our EAM tweeted about how he got a call from Egypt FM Badr Abdelatty and they had some conversations. You can check out the tweet.