Over the past three days more than 15,000 Nigerians have crossed the 300-metre (yard) river bridge that forms the border with Cameroon, following calls by military and local leaders for residents to return, an official in Gamboru told AFP yeterday.
"More are coming in everyday," he added.
Boko Haram fighters seized Gamboru in violence-wracked Borno state in August 2014, forcing thousands to flee across the border to the town of Fotokol on the other bank of the river in northern Cameroon.
"We found a looted and burnt out town which is shadow of its former self," said Abacha Mari, one of those who returned to Gamboru on Wednesday.
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"More than nine-tenths of the buildings in the town have been damaged by fire while the rest have been washed away by the rains," he added.
"Everything was looted and the streets are barely recognisable."
Although Boko Haram were forced out of Gamboru 11 months ago, the refugees say there are only now beginning to feel confident enough to return because the Nigerian army has sent a large contingent to the town.
The return of the refugees is being coordinated by Cameroonian soldiers and local officials in Gamboru, the returning residents said.
The Nigerian refugees and their belongings were screened at the Cameroonian side of the bridge by soldiers using sniffer dogs to detect explosives before they were allowed cross back into Nigeria where officials were ready to welcome them and provided them with the necessary papers for their return.
"Nobody found anything in their homes which have been looted and burnt," said returnee Ibrahim Wanzan.