Fruit fly

Yes, this looks like Julus sp. millipede.

I am sorry that I did not take any better photos, because more information is needed in order to determine the pest. Thank You.

That would be helpful. I also could suggest you to check its resemblance with wireworms (Elateridae, Insects).

I ja bih reko da je neka stonoga iz Julida.

Maybe  the insect put the eggs inside the fruit and then develops later.

Or maybe one of the small fruits grown in the center of the fruitو

you noted its seeds.