The two officials of global press rights group, Committee to protect Journalists, CPJ; have been freed by Tanzania's immigration authorities.
The two, a former Nation journalist Muthoki Mumo and South Africa's Angela Quintal, were arrested while in their Dar es Salaam hotel room and detained at an unknown location.
Reporters Without Borders, a pressure group, ranked Tanzania 93rd out of 180 countries worldwide in its 2018 World Press Freedom Index, down 10 places from the previous year. They were eventually released by the authorities to their hotel in Dar es Salaam but their passports were withheld.
South Africa's Department of International Relations and Cooperation (Dirco) said the two journalists are back in their hotel.
The two staffers were detained in Dar es Salaam on Wednesday evening.
"However our officials established that they started holding meetings with local journalists and that's contrary to the conditions of their entry permits", noted Mr Mtanda.
Quintal is a respected South African journalist and former editor of the Mail and Guardian newspaper‚ now working for the media freedom group based in America.
Sub-Saharan Africa representative Muthoki Mumo and Africa Programme coordinator Angela Quintal who are detained in Tanzania.
"It is deeply ironic that through their unjustified and abusive detention of our colleagues, Tanzanian authorities have made their work that much easier, " he said. It is now abundantly clear to anyone who followed the latest developments that Tanzanian journalists work in a climate of fear of intimidation.
The acting chairperson for Tanzania Editors Forum (TEF) Deodatus Balile said he was set to supposed to meet with the CPJ staff on Sunday.
CPJ had earlier demanded for the release of the journalists, as well as other media stakeholders.
The department announced on Thursday that Quintal and Mumo were released following their detention on Wednesday.
CPJ accused the authorities of sending a false tweet from Quintal's personal account saying that they had been released and making several attempts to access her email account.