Six journalists and one other staff have been arrested following raids on a newspaper office in Nigeria. Detectives stormed the Lagos-based premises of independent daily newspaper The Nation on Tuesday, arresting seven. The arrests are believed to be linked to the publication of a private letter on 4 October from former head of state Olusegun Obasanjo to President Goodluck Jonathan, suggesting Jonathan replace CEOs of several government agencies. Obasanjo accused the newspaper of publishing the letter with a forgery of his signature. The journalists are expected to appear in court tomorrow.