The operation against Boko Haram, the group that wants an Islamic state in northern Nigeria, is aimed at retaking territory seized by the militants and ridding the country of "terrorist activities," the miltary has said.
The offensive has included air strikes on Boko Haram strongholds in remote parts of northeastern Borno state, and has spread to the state capital Maiduguri, the insurgents' traditional home base -- which residents said today was under a blockade.
"There is a huge build-up of trucks loaded with essential commodities... Along the Baga road on the way out of Maiduguri to the northern part of the state," said resident Ibrahim Yahaya.
"The drivers said they have been prevented by the military from going northward," he told AFP by email.
More From This Section
The phone network in Borno has all but collapsed since President Goodluck Jonathan on Tuesday declared a state of emergency there and in two neighbouring states, Adamawa and Yobe.
The curfew was being enforced today, with most roads deserted, an AFP journalist reported, while some living in areas not impacted by the curfew also stayed in doors.
"My area is not affected but I have to stay at home with my family," trader Ezekiel Adamu said.
He explained that he was afraid of coming across soldiers, who "seem to have more power with the state of emergency."
Supplies were also running short in the city, where Boko Haram was founded more than a decade ago by the radical cleric Mohammed Yusuf, who was killed in detention in 2009.
"We've been eating without meat since Friday... But there is nothing I can do. This is the challenge of emergency rule," said resident David Olutayo.
Supply shortages and price hikes have also started to bite in the town of Gomboru Ngala, on the border with Cameroon, where some Borno residents have fled to escape the air raids.
"Trucks bringing in goods from Maiduguri have ceased since last week," said resident Grema Babagoni, adding that prices have soared as much as 25 per cent.