How to delete pictures that have been transferred from a droid to an iPhone?

I had a droid and when I got an iPhone 4S all the pictures were transferred but I'm unable to delete some.

If you are unable to delete them on the iPhone follow my precise instructions:

1. Go to Photos (Application)

2. There are different selections. Your Albums or Photo Stream. Go into either one.

3. Hit edit and select all the photos manually.

4. Hit "Delete".

5. There it should be deleted!

Tip: You can also delete photos using iTunes under your iPhone.