According to the Newspaper quoting military sources, said the number of soldiers buried in that manner could be higher than the figure.
"At least nine soldiers were beheaded... in addition to two civilians" at the checkpoint about 500 kilometres (300 miles) south of Tripoli, Colonel Ahmad al-Mesmari said, blaming the Islamic State jihadist group for the gruesome attack.
The source said that some arrests may have been made, but that the information was being kept as top secret so as not to add to public tension.
Olabanji, a brigadier general, asked the soldiers to always make sure their weapons are serviceable as the strike order on the secret Boko Haram location could be given at any time.
On Saturday, hundreds of thousands of people flooded the streets of Harare, singing, dancing and hugging soldiers in an outpouring of elation at Mugabe's overthrow.