Exxon Mobil said a drilling rig damaged some of its pipelines in Nigeria. The incident is the latest blow for Nigeria’s oil sector, which has been plagued by a series of outages caused by damage to the country’s infrastructure. In the past week, both Royal Dutch Shell RDS.A -2.21 % PLC and Chevron Corp. CVX -1.35 % have faced disruptions to their Nigerian output and the International Energy Agency said Thursday the country’s oil production hit a two-decade low in April. Exxon said the incident occurred on May 8 when a drilling rig owned by Depthwize Nigeria Ltd. and drilling on behalf of Conoil Producing Ltd. experienced mechanical difficulties and damaged Exxon’s pipelines. The company said some of its production had been curtailed and declared force majeure, a move that gives it legal indemnity for being unable to fulfil its export obligations. Exxon didn’t say how much oil was […]