DAKAR, Senegal A boat carrying migrants capsized off the coast of Senegal over the weekend, leaving at least four people dead and several others missing, local authorities said Monday.The artisanal fishing boat left the town of Mbour, nearly 80 kilometers (50 miles) south of the capital, Dakar, heading to Europe on Sunday afternoon before capsizing a few miles off the coast, Amadou Diop, the district's prefect, told The Associated Press.Local fishermen rescued three people who were brought back to shore by naval authorities.Senegal's navy is looking for those missing, Diop said, adding that the exact number of passengers remained unknown.In recent years, the number of migrants leaving West Africa through Senegal has surged with many fleeing conflicts, poverty and the lack of job opportunities. Most head to the Canary Islands, a Spanish archipelago off the coast of West Africa, which is used as a stepping stone to continental Europe.Since the beginning of the year, more than 22,300 peop