GOMA, CONGO — M23 rebels seized the town of Minova in the eastern part of the Democratic Republic of the Congo, a key supply route for the provincial capital, Goma, authorities said Tuesday. The move led to an exodus of people in the face of a new offensive by the rebel group, which has taken several strategic towns in recent weeks. The provincial governor of South Kivu, Jean-Jacques Purusi, confirmed the capture of Minova, adding that the rebels have also taken the mining towns of Lumbishi, Numbi and Shanje in the same province and the town of Bweremana in neighboring