Italy says another migrant boat capsized, some 80 feared dead

Migrants are seen on a partially submerged boat before to be rescued by Spanish fregate Reina Sofia (unseen) taking part in the European Union military operation in the Southern Central Mediterranean (EUNAVFOR MED) off the coast of Libya in this handout picture courtesy of the EUNAFVOR MED released on May 26, 2016. EUNAVFOR MED/Handout via REUTERS

ROME (Reuters) - A migrant boat capsized in the Mediterranean on Thursday and while about 100 passengers were rescued, an unknown number are feared dead, officials said.

All told, the Italian coastguard said it had helped save 4,000 migrants today, in 22 operations. That brings the total number Italy has helped rescue since Monday to more than 10,000 - a sign that Europe's immigration crisis is far from over.