He said although cargo security was a collective responsibility, cargo operators were the only ones who knew what was being transported and should take additional measures.
"We encourage cargo companies, especially those who deal with valuables such as cellphones, computers, cash and so on to have own security programmes. We emphasise the fact that it cannot be left solely to the SAPS and Acsa to provide security," Maseko told reporters at a briefing on Thursday.
OR Tambo International Airport had a security forum which included the airlines, police, Acsa and other parties operating at the national key point, he said. The forum meets frequently to evaluate and respond to possible security threats.
The robbery on Tuesday evening saw vehicles occupied by several armed men, some of whom were in police uniforms, access a restricted area of the airport. When requested to validate their credentials, the men produced firearms, rounded up security staff in the security checkpoint and ordered them to lie on the floor, according to Acsa.