The security operatives were said to be in search of materials related to the recent nationwide protests. The leadership of Public Services International (PSI), an international labour group, has condemned the recent invasion of the national secretariat of the Nigeria Labour Congress (NLC), by the Nigeria Police.Mr Daniel Bertossa, General Secretary of PSI, in a statement on Friday, described the invasion as illegal. The News Agency of Nigeria (NAN) recalls that on August 7, armed security operatives invaded the Labour house and allegedly carted away several books and publications from a books…