What is doing this and how can I kill it????

Here are a few pictures of the tomatoes that were munched on today. Sooooo irritating. Just a few days before the fruit is good to go, something eats it. I think this is happening during the day, I checked the tomatoes this morning on my way to work and I'm pretty sure that they were whole. but this afternoon found this. What ever it is is eating both red and yellow tomatoes.

I still haven't gotten a tomato out of the garden this year.