S.C. Code Ann. § 25-3-180

Any military force, organization, unit or detachment thereof of any other state who are fresh in pursuit of insurrectionists, saboteurs, enemies or enemy forces may continue such pursuit into this State until the military or police force of this State or the forces of the United States have had a reasonable opportunity to take up the pursuit or to apprehend or capture such insurrectionists, saboteurs, enemies or enemy forces and may arrest or capture such persons within this State while in fresh pursuit. Any such person who shall be captured or arrested by the military of such other state while in this State shall without unnecessary delay be surrendered to the military or police force of this State or to the United States, to be dealt with according to law. This section shall not be construed to make unlawful any arrests in this State which would otherwise be lawful and nothing contained in this section shall be deemed to repeal any of the provisions of the Uniform Act on the Fresh Pursuit of Criminals.