The background of the incident remained unclear as of Saturday night, although the reports added that additional information would be released later.
Khash is located in the Sistan-Baluchestan province near the border with Pakistan and Afghanistan.
Clashes with smugglers and militants in the province are common. In April, the IRGC announced that it dismantled a "terrorist" cell in the area and killed three of its members. In February, protests broke out after fuel smugglers were killed in clashes with IRGC forces.