Nigeria's President Muhammadu Buhari said Nigeria is "willing to bend over backwards" to win the girls' freedom.

"Today, as in the past, religions are being manipulated to incite intolerance and hatred against individuals, groups or entire populations."

By the close of Obama-convened summit, a number of countries committed to admit significant numbers of refugees into their countries.

Media reported the men were found one day after their abduction along the side of a highway with their hands and feet bound.

The refugees came from countries including Syria, Eritrea, Mali and Nigeria. Many escaped war and conflict to seek a new life in Italy.

Ties between the two leaders never fully recovered after Netanyahu showed up on Capitol Hill to lobby Congress against Obama's nuclear deal with Iran.