I don't think this is true, but if you read through the different evidence it's pretty interesting.

http://www.prisonplanet.com/articles/november2004/291104massgraves.htm

from a fair and balanced islamic website?

"The controversial Islamic website Jihad Unspun is claiming that a new video carried on its website provides further evidence of mass graves of US soldiers that have been hidden to reduce the official casualty count."