A South African National Defence Force (SANDF) member was arrested for negligence after a military truck was stolen in broad daylight in Centurion.
SANDF spokesperson Brigadier General Mafi Mgobozi said the truck, used to transport goods, was empty when unknown people took it on Wednesday afternoon.
The driver, who is a flight sergeant, appeared in a military court for negligence on Friday and his case was postponed to 6 August.
"At the present moment, no one has been arrested for the theft and [the] investigation is at an advanced stage."
The truck has not yet been found.
The military has been patrolling South Africa's streets for the last few weeks, following the violence and unrest in Gauteng and KwaZulu-Natal, which President Cyril Ramaphosa described as a "failed insurrection".
Stores in parts of the provinces were looted and vandalised.
More than 1.5 million rounds of ammunition were looted from a container depot in Mobeni, News24 previously reported.
The ammunition had been stored in a container at a depot in Prospecton and was said to belong to a private company.
National police commissioner Khehla Sitole told the National Assembly's Portfolio Committee on Police on Thursday that two people had been arrested in possession of a "certain portion" of the ammunition.