Brown University’s campus has always been open. The shooting raises concerns.

When a shooter burst into a Brown University study session on Saturday and opened fire, the doors to the building were unlocked. Some students said the first alert from the university warning of an active shooter came too late — precious minutes after they had gotten texts from friends about rumors of a shooting. Some said later alerts gave conflicting information.

Shortly before 5:30 p.m., Brown’s campus public safety office warned of a report of shots fired at another location. About a half-hour later, a new alert said that reports of a second shooting had been unfounded.

Brown, unlike some other urban universities, is not sealed off by fences or other barriers; it’s accessible to anyone who wants to walk onto the Providence campus. In today’s politically charged climate, many universities have developed detailed protocol over access to campus buildings to protect students and faculty, officials at the Association of Threat Assessment Professionals said.

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