Story highlights Doctors Without Borders says "about 90" people killed in airstrike on camp

Nigerian leader says air force "accidentally bombed a civilian community"

(CNN) Scores of people were killed when a Nigerian fighter jet mistakenly bombed a camp for the internally displaced during an operation against Boko Haram militants, according to Nigerian officials and the Red Cross.

The Nigerian government provided no official death toll, but humanitarian aid group Doctors Without Borders said "about 90" people were killed Tuesday at the camp in Rann in the northeastern state of Borno.

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Maj. Gen. Lucky Irabor, a Nigerian army commander, said during a news conference in Maiduguri that two soldiers were "affected" during the operation. He did not elaborate.

"There are casualties and wounded but the actual numbers," he said, "I am yet to get the numbers of casualties of civilians (who) were killed."

Nigerian President Muhammadu Buhari described the airstrike as "regrettable" in a statement on Twitter.

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