"We suspect that the plane was on its way to the Wonderboom airport", said Mahamba.
An aircraft has crashed near the Wonderboom Airport in Pretoria.
About 20 people have been injured in a charter plane crash near South Africa's capital, Pretoria.
He added that the ER24 Oneplan Helicopters were now on the scene to airlift any critical patients to hospital.
Spokesperson Russel Meiring says five ER24 services and others are working to extinguish the fire which broke out after the crash.
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Several of them suffered serious injuries, he said.
"There are critical patients‚" Loubser said.
At the same time, Tshwane Emergency Services say four workers have been left critically injured after a plane hit a factory before crashing.
South African Civil Aviation Authority spokesman Kabelo Ledwaba said its investigators were at the scene and would issue a statement.
Once treated, the patients will be transported, as well as airlifted by the ER24 medical helicopter, to nearby hospitals.