MEND has declared "all-out" war on the government in Nigeria, demanding oil revenue go for national investments rather than for political gain.
It launched attacks on facilities operated by California-based Chevron and Royal Dutch Shell as part of its militant effort to gain a greater share of the regional oil wealth. MEND took responsibility for a weekend attack on the Atlas Cove Jetty near Lagos, its first attack outside the Niger Delta.
The militant group declared a 60-day cease-fire Wednesday following the release of Henry Okah, its leader, under an amnesty deal with the Nigerian government.
MEND threatened to lift the cease-fire, however, after it observed Nigerian military forces conducting naval patrols near its camps, the Platts news service reports.
"If this information from a very reliable source within the (military) happens to be true, the cease-fire will be called off with immediate effect," a MEND statement read.
Nigerian military officials said the naval patrols were routine and not intended to provoke the militant group.