ANC leader Musalia Mudavadi's three workers died after drinking an unknown concoction on Thursday.
The three, together with four others who survived, were working on a construction project that the NASA co-principal co-owns.
Mudavadi broke the news on Friday night on his Twitter handle.
He said the survivors
were discharged from the hospital.
He did not mention whether the three died on the same day.
"On Thursday, 7 workers on a construction project in which I've partnered drunk an unknown concoction. Sadly 3 lost their lives but 4 have been discharged. The matter has been reported to the police for further investigation," he tweeted.
Mudavadi, who is currently out of the country, said he would assist the affected workers once he is back.
