CALAIS, France (AP) — At least 31 migrants bound for Britain died when their boat sank in the English Channel, in what France’s interior minister called the biggest tragedy involving migrants on the dangerous crossing to date. Interior Minister Gerald Darmanin said 34 people were believed to have been on the boat. Authorities found 31 bodies and two survivors, and one person appeared to still be missing. The nationalities of the travelers were not immediately known. Four suspected traffickers were arrested on suspicion of being linked to the sunken boat, Darmanin told reporters in the French port city of Calais. Activists demonstrated outside the port of Calais.