A charity monitoring migrant boats in the Mediterranean said Sunday some of the 47 people on a boat it had earlier warned Italian authorities was in distress off the coast of Libya had drowned. Alarm Phone, a hotline used by migrants in distress, tweeted that it had first alerted Italian authorities early Saturday morning to the "urgent distress situation" of a boat northwest of Benghazi. According to different sources, dozens of people from this boat in distress have drowned," tweeted Alarm Phone Sunday. AFP was unable to immediately confirm the report. The statement from Alarm Phone comes exactly two weeks after a shipwreck off the southern Italian coast of Calabria in which at least 76 migrants drowned.