`` The gunboat was also stripped of its weapons before it was disabled by explosives . Militants claim to have overpowered gunboat and bombed a major highway . Third alleged attack this month by the Emancipation of the Niger Delta ( Nigeria ) Last month the militant group declared an ` ` all - out war '' on the government . Recent violence has limited flow of crude oil exports from Nigeria .
Militants claim to have overpowered gunboat and bombed a major highway . Third alleged attack this month by the Emancipation of the Niger Delta ( Nigeria ) Last month the militant group declared an ` ` all - out war '' on the government . Recent violence has limited flow of crude oil exports from Nigeria .