The main Nigerian rebel group in the Niger Delta has said it is open to peace talks with the government after its leader was released from detention as part of a government-backed effort aimed at ending violence in the oil-rich region.
Hours before Henry Okah was released by the government on Monday, his Emancipation of the Niger Delta (Mend) fighters killed five oil workers in an attack on an oil tanker wharf in Lagos, the country's most populous city and financial capital.
But after Okah, the head of Mend, was freed following a decision to drop treason and gun-smuggling charges against him, Mend said it "considers this release as a step towards genuine peace and prosperity if Nigeria is open to frank talks and deals sincerely with the root issues once and for all".
Mend says it is fighting for greater autonomy for the Niger Delta and a fairer distribution of its oil wealth.
Other groups have also said that they would lay down their arms after Okah's release.
More needed
But Abubakar Momoh of Lagos State University said the Nigerian government, which relies on oil for more than 90 per cent of its export earnings, had to do much more than just release Okah to achieve peace in the delta.
"What the government has done in the case of Okah is like treating the symptom and not curing the disease," he said.
"That will not put an end to militancy there because there are many Henry Okahs there.
"There are issues that drove the militants to the trenches. Until those issues are resolved in a fair and just manner, there will never be peace in the Niger Delta."
State-run Nigerian National Petroleum Corporation (NNPC) says that monthly oil revenue this year has dropped to around $1bn from an average of $2.2bn in 2008.
Mend called Monday's attack on the depot and loading tankers moored at the facility "unprecedented".
"We encountered some slight resistance from the Nigerian navy guarding the facility but they were easily overpowered. Over nine may have been injured or killed," it said.
It took rescue workers around six hours to extinguish the fires that were apparently started after explosives were used to destroy part of the facility.
Until now, Mend had largely concentrated its campaign on oil facilities and government targets inside the delta region.
PHOTO CAPTION
An aerial view of oil storage tanks at Chevron Texaco's Escravos export terminal in southern Nigeria's Niger Delta in 2003.
Al-Jazeera