The story is, in a nutshell: farmer doesn't want to sell his land for a pittance to the Chinese government, who claim they own all land anyway. Farmer does a lie down protest in the road, a government official orders the driver of a huge road flattening machine to run him over, the driver does.
Lots people saying the total lack of blood suggests the pics are fake.
If the major media outlets start running this story, then we can be sure it's true. Until then, other possibilities remain: faked photos, terrible accident by chance (driver unaware he was there), terrible accident arising from a stand off (driver/officials thought he'd roll out of the way but didn't), or deliberate order. I hope this is properly investigated.