About 30 explosive devices have been discovered near a shallow dam in Bultfontein, north of Pretoria.
“We are investigating the origins of the bombs,” Gauteng police spokesperson Captain Tsekiso Mofokeng said.
The weapons, found yesterday after a tip-off from a local resident, included grenades and mortar bombs. Mofokeng asked locals to contact police if they found more.
Mofokeng said the bombs were not linked to those discovered in Pretoria West earlier this week.
“We are currently trying to establish who owns the land on which the bombs were discovered,” he said.
On Monday, 15 World War II incendiary devices were removed from a scrap yard in Pretoria West after one exploded, killing one man and seriously injuring another. Of the 15 devices found at the site in Rebecca Street, six were found to be live.
More military projectiles and a mortar were found near Pretoria West High School on Tuesday.
Pretoria West station commander Colonel Caroline Naidoo said a security guard working at the school noticed two men carrying something heavy and approached them.
“When they saw him, they dropped the weapons and fled,” she said.
The weapons were a 25-pound (about 11kg) cannon projectile and a practice mortar. The guard informed the school principal.
The principal alerted police, and the school and surrounding areas were evacuated while the bombs were disarmed.
Naidoo appealed to people to not touch such devices if they found them, but to contact police.