SAPS forensic teams are currently on scene at the Elm Road plot which had been used as a drug manufacturing laboratory.
The drugs’ estimated street value is not yet clear, but police on the scene said drugs with a mass of approximately 2,5 tons were found at the home.
A thick layer of raw drugs was left to dry on a tennis court at the property.
Police were alerted to area after the house caught alight at around 8.30am this morning.
Capt Mack Mngomezulu, Benoni SAPS cluster media liaison officer, said the fire may have been caused by an explosion.
A neighbour at the property apparently saw smoke emanating from the house and alerted CMS.
According to Mngomezulu, four people (three men and a woman) ran away from the property when CMS arrived on scene.
The fire brigade was summoned, and a Benoni CPF member saw the drug manufacturing equipment and alerted police.
Police found passports of four Lesotho nationals in the house, one woman and three men.
No-one has been arrested.
The Organised Crime Unit will investigate the case.
