At least 43 people were missing off the southeastern coast of Tunisia after a boat carrying more than 120 migrants sank, the Tunisian Red Crescent said on Saturday.
An Italian prosecutor has ordered a probe into the sinking of a migrant boat in the Mediterranean following claims that a US navy ship which rescued 42 survivors may have ignored them at first.
At least five migrants died and an unknown number were feared missing after their boat capsized off western Libya on Monday, Libyan coastguard officials and a charity said.
The EU urged Italy on Thursday to allow more time to discuss its threat to suddenly stop vessels from other countries disembarking migrants in Italian ports, after rescuing them in the Mediterranean.
A migrant boat capsized in the Mediterranean on Thursday and about 100 of its passengers have been rescued while the number of dead is unknown, officials said.