Bombs planted in three locations on the campus of Bayero University in the city of Kano, in northern Nigeria, were discovered and successfully defused on Tuesday, according to news reports. According to Vanguard, a Nigerian newspaper, the campus was evacuated in confusion, and an eyewitness reported seeing students, faculty members, and staff members running from the campus. Worshipers at the same university taking part in a Christian service were attacked on April 29, resulting in at least 16 fatalities, and Vanguard reports that Tuesday’s discovery also marks the second time in as many weeks that explosive devices have been found on the campus.

Nigeria’s predominantly Muslim north has been plagued by violence in recent years as Boko Haram, a terrorist group whose name means “Western education is a sin,” has carried out a series of attacks and bombings that have killed hundreds of people.