This study aimed at examining how selected Nigerian national daily newspapers have adopted and applied Peace Journalism (PJ) principles in reporting Nigerian conflicts with focus on the two conflict situations in South-East and South-South Nigeria – the Indigenous People of Biafra (IPOB) and Niger Delta Avengers (NDA) conflicts. The study was anchored on Framing, Social Responsibilities and Conflict theories. Mixed research methodologies – Survey and Content Analysis –, were employed for the study. Five hundred and eighty two (582) journalists were sampled in the survey, while 168 editions of four selected newspapers were content analyzed from 2014 to 2016 using a census and simple random sampling techniques respectively. The data were analysed using simple percentage through SPSS and presented in tables and pie charts. Findings from the study showed clear ambivalence between respondents’ claimed pattern of conflict reporting and the actual manifest reports in the sampled newspapers. The conflict news as reported by the Journalists yielded a war journalism result. The IPOB and NDA conflicts received the least attention of all other conflicts reported in the sampled newspapers. The findings by implication, brought to the foreground the disconnect between knowledge of peace journalism principles and the pragmatic translation of same in every day journalism practice among the journalists in South-East and South-South Nigeria. The study concluded that peace journalism paradigm has not yet been adopted by the sampled journalists as the new principle in reporting conflicts that could help in the de-escalation and general conflict management. It was therefore, recommended that journalists should be trained and retrained in this new approach to conflict reporting. Again, this new paradigm should be introduced in the Nigerian Universities’ Mass Communication curriculum to further enhance the training of student journalists.