An ICRC spokeswoman said six Nigeria Red Cross members werekilled and 13 wounded.
The United Nations Children’s Fund (UNICEF) said the deaths “underline the importance of protecting civilians in complex humanitarian emergencies.”
The Boko Haram insurgency has killed more than 15,000 people since 2010 and forced some two million to flee their homes, manyof whom have moved to camps for internally displaced people.
“The president pledges federal help for the state government in attending to this regrettable operational mistake,” said FemiAdesina, a spokesman for President Muhammadu Buhari, in an emailed statement.
The air strike came amid an offensive against Boko Haram byNigeria’s military over the last few weeks. Buhari said lastmonth a key camp in the jihadist group’s Sambisa forest base inBorno state had fallen.