A post by @Vesal2908 claimed that Yemenis had seized a ship traveling from Saudi Arabia to Israel last year and were now opening its ammunition cargo:

Last year, the Yemenis seized a ship traveling from Saudi Arabia to Israel, but because it was only impounded, they did not touch its cargo. Today, now that it has become war booty, unboxing these new European cartridges is therapeutic.

Good for them :))

Shin (@hey_itsmyturn) challenged that description and linked to a Reddit post about Chinese 7.62x39 ammunition packaging:

Rafidis and their tall tales.
That's a Chinese spam can.