Dozens of refugees mostly from Sudan and sub-Saharan countries have protested in Tunisia complaining about their treatment and demanding to be evacuated.
The migrants held a sit-in in front of UN offices in the southern port of Zarzis.
“We have refugee status but this organisation (UNHCR) does not care about us,” one Sudanese protester told AFP.
Some held up banners reading “stop the violence against us.”
The Tunisian coastguard intercepted more than 19,500 migrants trying to cross the Mediterranean to Europe during the first three-quarters of last year.