 After his release he continued working for the ANC as National Organizer and was also prominent in the underground.He was banned in 1961, and in 1962 placed under a 24-hour house arrest.In 1963 Thomas Nkobi fled South Africa for exile in Dar es Salaam / Tanzania and later Lusaka / Zambia, where he became actively involved in mobilising international public opinion against the Apartheid regime.