Over 10,000 migrants arrived in the first three months of this year.
The North African migrants were on seven vessels which were rescued in a single day this week, Italian and Tunisian authorities said on Wednesday.
Italian defence minister speaks of "urgent" need to tackle jihadists in North Africa amid wave of boat refugees.
ISIS militants allegedly smuggled into Europe through eastern Mediterranean borders disguised as refugees.
The boat sent out a distress call on Tuesday, but no gunmen were found on board
Air crews raced to rescue as many of the hundreds trapped on board as possible before nightfall as storms hampered seaborne operations.
Hundreds of migrants fleeing war zones in Africa and the Middle East have drowned in the "deadliest weekend ever in the Mediterranean", says UNHCR
More than 5,000 people were rescued by the Italian Navy this weekend as migrants attempt to cross from North Africa.