S.C. Code Ann. § 24-21-450

At any time during the period of probation or suspension of sentence the court, or the court within the venue of which the violation occurs, or the probation agent may issue or cause the issuing of a warrant and cause the defendant to be arrested for violating any of the conditions of probation or suspension of sentence. Any police officer or other agent with power of arrest, upon the request of the probation agent, may arrest a probationer. In case of an arrest, the arresting officer or agent must have a written warrant from the probation agent setting forth that the probationer has, in his judgment, violated the conditions of probation, and such statement shall be warrant for the detention of such probationer in the county jail or other appropriate place of detention, until such probationer can be brought before the judge of the court or of the court within the venue of which the violation occurs. Such probation agent must forthwith report such arrest and detention to the judge of the court, or of the court within the venue of which the violation occurs, and submit in writing a report showing in what manner the probationer has violated his probation. Provided, that any person arrested for the violation of the terms of probation must be entitled to be released on bond pending a hearing, and such bond shall be granted and the amount thereof determined by a magistrate in the county where the probationer is confined or by the magistrate in whose jurisdiction the alleged violation of probation occurred.