The leader of the Boko Haram sect, Abubakar Shekau, has released a video that debunks the military claim that the jihadist group had been routed from its Sambisa Forest stronghold. The video was released on Thursday.

Shekau revealed that the video was filmed on Christmas day.

Shekau who spoke in both Hausa and Arabic said: “We are safe. We have not been flushed out of anywhere. And tactics and strategies cannot reveal our location except if Allah wills by his decree,” Shekau said in the 25-minute video, flanked by masked armed fighters.

“You should not be telling lies to the people,” he said, referring to Nigerian President Muhammadu Buhari who said on Christmas Eve that Boko Haram has been flushed of the Sambisa forest.

“If you indeed crushed us, how can you see me like this? How many times have you killed us in your bogus death?” he asked.

He vowed to continue fighting on until an Islamic state was imposed in northern Nigeria.

“Our aim is to establish an Islamic Caliphate and we have our own Caliphate, we are not part of Nigeria.”

Buhari had announced that a month-long military campaign in the 1,300 square-kilometre (500 square-mile) forest in northeastern Borno state had led to the “final crushing of Boko Haram terrorists in their last enclave in Sambisa Forest”.