The authorities in Ethiopia’s Tigray region have stopped students from going to study in the country’s Amhara region, saying their safety cannot be guaranteed.
Over the last year there have been several outbreaks of ethnic violence on university campuses.
The federal government in the capital, Addis Ababa, says the officials in Tigray do not have the authority to make the decision and insist security has improved so the students will be safe in Amhara.
Reports say the dispute highlights tensions between the Ethiopian government and Tigrayans who used to be the dominant ethnic group in the government before Prime Minister Abiy Ahmed came to power last year.
Last week, Mr Abiy won the Nobel Peace Prize for his efforts to “achieve peace and international cooperation”. But ethnic tensions within Ethiopia have increased over the past year, which have threatened the stability of the country.