Nigerian airlines grounded flights on Saturday and radio stations were silenced, as a monthslong fuel shortage aggravated by striking oil-tanker drivers worsened in Africa’s biggest oil producer. Vehicles also were grounded. Normally bustling roads in Lagos, a metropolis of 20 million, were half-empty and gas stations closed on Saturday. One station owner said he had fuel, but strikers were threatening to set fire to any stations selling it. He insisted on anonymity for fear of reprisals. Police were arresting black marketers selling fuel at roadsides at four times the regulated 87 naira (40 cents) a liter. Meanwhile, radio stations went dead on Saturday night, including Classic FM, The Beat and City FM, hit by frequent power outages and out of diesel fuel for generators. Confusion reigned at bus stations […]