Workers conduct disinfection at a workplace in Abuja, Nigeria, April 2, 2020. (Xinhua/Olatunji Obasa) Nigerian government has declared phase four of movements restriction across the country with the re-introduction of curfew, among other restrictions aimed at curbing the spread of the deadly variants of COVID-19 recorded in some parts of the world. ABUJA, May 12 (Xinhua) Nigerian government has declared phase four of restriction of movements.