Dr Vejay Ramlakan arrived on Wednesday at the Medi-Clinic Heart Hospital in Pretoria, where former president Nelson Mandela remains in a critical condition.
Ramlakan is the country’s former surgeon-general. He stepped down earlier this year.
His car was not searched by the police and security guards when he arrived at the hospital.
Security at the private hospital has been increased since Mandela was admitted on June 8 with a recurring lung infection.
Police started searching vehicles entering the facility at about 5am.
Earlier, Tshwane metro police officers barricaded part of Celliers Street, leading to the hospital’s main entrance.
Numerous traffic patrol cars were also in the area. – SAPA