The defense official, who spoke on condition of anonymity, said the US military made a string of recommendations after Nigeria's leaders asked for help determining "possible courses of action" in the fight against the Islamist militants.
One recommendation was to send a group of US advisers -- most likely special operations troops -- to Nigeria to train local forces. They would not be in a combat role.
Such a mission would be a resumption of an earlier Pentagon effort that Nigeria stopped in late 2014 amid US concerns of suspected Nigerian army abuses and its failure to protect civilians, as well as strained diplomatic ties stemming in part from the US blocking of Nigerian efforts to buy Cobra attack helicopters.
The New York Times first reported the potential deployment today, saying the Pentagon was poised to send "dozens" of special operations advisers to Maiduguri, capital of northeast Borno state.
Also Read
But the defense official downplayed the speed of any deployment, and said the operation was still being discussed.
"I don't think anyone is ready to approve anything today," the official said. "Recommendations were made, these are still being assessed."
The US embassy in Nigeria said in 2014 that it regretted the end of the training program, which was offered following Boko Haram's abduction of 276 schoolgirls in northeast Nigeria.
US advisers and special operations troops are playing a growing role in the global fight against Islamist extremists, including in Iraq, Syria and Libya.