"None of the things Israeli authorities had promised the 12 Eritreans when they had agreed to relocate to Rwanda a few weeks prior".
Henry Oryem Okello told a local Ugandan news agency, Daily Monitor that no such deal had been reached with Israel, which is ordering Africans it labels "infiltrators" - meaning those who did not enter the country through an official border crossing - to leave within 90 days.
Those who comply with the directive by March 31 will receive a payment of $3,500 along with free airfare and other incentives.
Netanyahu said a barrier Israel completed in 2013 along its border with Egypt had effectively cut off a stream of "illegal infiltrators" from Africa after some 60,000 crossed the desert frontier. Majority came from war-torn Sudan, Somalia and Eritrea, and several thousand have applied for asylum, claiming their lives would be in danger if they were forced to return.
Right groups say the move would violate both worldwide and Israeli laws.
"We see here the implementation of the decision", said Drori-Avraham of the Tel Aviv-based Aid Organisation for Refugees and Asylum Seekers in Israel (ASSAF).
People from Eritrea and Sudan make up a significant number of migrants in Israel.
The Israeli government is looking for ways to step up deportations and close down the Holot migrant detention center this year. However, if they don't accept this offer and depart within the next three months, they will be imprisoned indefinitely.
This is all part of an Israeli campaign to expel roughly 42,000 illegal African migrants from the country.
The reports say the migrants who are mostly from Eritrea and Sudan will be given the option of going to their respective home countries, to Uganda or to Rwanda.
"Anyone who has a heart must oppose the expulsion of the refugees", read a letter signed by groups including the Centre for Refugees and Migrants, Amnesty International Israel, and the Association for Civil Rights in Israel. "All the evidence indicates that anyone expelled from Israel to Rwanda finds himself there without status and without rights, exposed to threats, kidnappings, torture and trafficking".