Non US traffic in US only campaign

Adword campaign

[venuma]

I have a campaign targeting US traffic only, but when I check my log using stat counter I see non-US traffic from google search partners, especially from netscape. (25% of the traffic is non US based).
I am pretty sure that the traffic is not as the result of natural listing.
Anybody else seeing this?

[skibum]

We see a little bit of this from AdWords (India & Mexico show up) but much more from the organic results. It might be helpful to add some kind of tracking parameter to the URLs in your AdWords campaigns so you can clearly distinguish paid and free traffic in the stats program.

[venuma]

As I mentioned in the previous post the non US traffic is coming from Netscape, google partner search and is not the result of natural search.