There were no serious injuries from the rounds, which included a modified shotgun shell that fires small rubber pellets as well as a type of bean-bag projectile, said Army Col.

NPR: Clash Over Hunger Strike At Guantanamo Bay

The confrontation ended within minutes, but not before two guards were struck in the head by prisoners and five of the prisoners were injured, including one struck by rubber pellets from what the military calls a "less-than-lethal" round fired from a modified shotgun.

WSJ: US military defends Guantanamo prison raid