Nigeria rebels say hit Shell site despite amnesty
The Movement for the Emancipation of the Niger Delta (MEND) said it attacked the well-head in the Afremo oil field because the military had gone on a "punitive expedition" in Delta state shortly after the amnesty proclamation.
It was not immediately possible to independently verify whether there was an attack or a military offensive.
(Reporting by Nick Tattersall, editing by Ralph Gowling)