Hundreds of Nigerian schoolgirls rescued days after kidnapping - CNN

At least 42 people were kidnapped from a state-run school last month and later released, and more than 300 schoolboys were taken and later freed in December.

These incidents have raised questions about the safety of schools in parts of northern Nigeria.

In a statement released on social media Friday, Buhari said the girls' abduction was "inhumane and totally unacceptable."

"This administration will not succumb to blackmail by bandits who target innocent school students in the expectations of huge ransom payments," Buhari said in the statement, which was posted by his official spokesperson.