Boko Haram is suspected in yet another deadly attack in Nigeria. At least 48 students were killed in a suicide bombing at a school in the northeastern part of the country. Dozens are being treated for injuries, some so serious that amputations may be required.

A suicide bomb attack in the same city killed 30 people one week ago when suspected Boko Haram fighters attacked a religious procession of moderate Muslims.

For more on the Nigeria school attack, CCTV America’s Elaine Reyes interviewed Daveed Gartenstein-Ross. He’s a senior fellow at the Foundation for Defense of Democracies and is a professor of security studies at Georgetown University. He specializes in the study of al-Qaeda and affiliated organizations.