'sorry for' or 'sorry about'

If you are sorry about something you feel sad or regret about it.
If you are sorry for someone who is sad it means you feel sympathy for him.

I am sorry about the broken window. I didn't mean to kick the ball so hard in the direction of your house.

I am sorry for the families and friends of the murder victims. They are suffering a lot.

Actually, I also use "sorry for" (as well as "sorry about") for the "regret" meaning:

I'm sorry for all the things I said.

Thanks for answering. So do we use 'sorry about' when we are responsible for someone's loss but 'sorry for' to show sympathy or regret? This thread says vice versa is correct

Anyone?

When someone has died, you can say: I am sorry for / about your loss.
There are many variations on sorry for and sorry about. We have given you the most common uses.