A 48-hour curfew has been imposed in parts of the central Nigerian city of Jos, after gunmen opened fire at a bar, leading to deadly revenge attacks, local reports say. Twelve people were reportedly killed when attackers ambushed the drinking spot. A mob is then said to have retaliated, killing 10 more people. Announcing the curfew, Plateau state governor Caleb Manasseh Mutfwang said an investigation had been opened and those responsible for the killings would be brought to justice. The state