The US govt wants two SA brothers extradited for trying to sell rhino horns to American hunters.
Police say the men involved were wearing Mozambican military and SANparks uniforms.
A gang was spotted by SANParks rangers yesterday before a shootout ensued.
The bid is part of a plan to move 500 of the animals to safety from poachers.
Abraham Smit was arrested two weeks ago by the Hawks after apparently evading American authorities.
Hugo Ras and 9 others were arrested earlier this month in connection with a spate of poaching incidents.