A maritime security company has warned shipowners of further violence in the Niger Delta in the coming weeks.
It was responding to a threat from Nigerian militant group Niger Delta Avengers (NDA) to target shipping unless it wins mediated talks with the government over the state's sale of crude oil.
MAST's Singapore general manager Ben Stewart said the NDA appear to be taking the place of terrorist organisation Members of the Emancipation of the Niger Delta (MEND).
But
