Nigeria will reduce military presence in the southern Niger River delta as the government works with regional governors to end attacks on oil installations, according to a presidency statement. A meeting of governors from the oil region and security officials recommended that troops limit their actions to providing security while the government seeks to engage the affected communities, Delta state Governor Ifeanyi Okowa told reporters in Abuja, the capital Tuesday. Nigeria’s crude output dropped to the lowest in almost three decades as armed groups intensified attacks to rupture pipelines. Total volume of crude shut due to the attacks range from 700,000 to 800,000 barrels per day, according to the state-owned Nigerian National Petroleum Corp. Naira weakens on the black market as investors flee