Hmmmm..I'd heard that criticism attributed to 'Doctors Without Borders/Medicines Sans Frontieres' but read the article on their site & nothing of Minefields was said.I certainly heard that 'criticism' on the BBC, but as Wofgang says, whether it has HAPPENED, or was just a cause for concern, I dunno....
Certainly there are an ENORMOUS number of Mines in Afghanistan (I cant recall any of the quotes of numbers, sorry) but apparently the only country with more is Angola.