AFRICAN MIRROR REPORTER SOCIAL media firms wanting to operate in Nigeria must register a local entity and be licensed, the country's information minister has said, the government's latest move since it banned Twitter last week. "We are insisting that for you to operate in Nigeria you must first be a Nigerian company and be licensed by the broadcasting commission," said Lai Mohammed, Nigeria's information minister, of social media companies. The new regulations will include conditions for continued operation, Mohammed said, without elaborating. The move comes amidst what critics say is a broader crackdown on freedom of expression in Africa's most…