NDC National Chairperson for Security Menyani Zulu has confirmed the development to Q-news.
Mr. Zulu says Mr. Kambwili is being held in one of the holding rooms at the Simon Mwansa Kapwepwe international airport.
He says Mr Kambwili was intercepted by state Police and Immigration officers as he arrived from South Africa.
Mr. Zulu says Police officer at the airport say they are waiting for further instructions from higher authorities on how to proceed over Dr. Kambwili’s detention.
Mr Kambwili was last week summoned for questioning at Woodlands Police Station in Lusaka but could not show up as he was believed to be unwell.