At least 140 Europe-bound migrants drowned off the coast of Senegal when their boat caught fire and capsized, marking the deadliest shipwreck recorded this year, the UN migration agency said on Thursday. The boat carrying 200 people sank a few hours after leaving the fishing town of Mbour, 100 km (60 miles) south of the capital Dakar, on Saturday, the International Organization for Migration (IOM) said. Video shared on local media showed a rescue boat of local fishermen approaching a thick column of dark smoke in the open ocean, as people swam frantically towards them. The Senegalese and Spanish navies and fishermen rescued some 60 people, but “at least 140 people have drowned”, IOM said in a statement. Migrant arrivals in the Canary Islands from West Africa have more than quadrupled so far this year to around 11,000 compared with the same period in 2019, IOM said. The surge has happened as other more favoured routes through Libya or Algeria, and across the Mediterranean Sea to southern Europe, have become blocked off by tougher controls.