Migrant Offshore Aid Station and Medcines Sans Frontiers (MSF) have just completed the rescue of 96 people, Medcines Sans Frontiers said in a tweet.
The organisation said they were now heading towards a second vessel in distress.
Moas and MSF have this year joined forces to create the only private search and rescue service in the Mediterranean.
It is feared that this year will be the deadliest year yet for those risking the Mediterranean crossing. So far, an estimated 1,750 have drowned compared to 96 during the same period last year.