A person of interest is in custody after a gunman opened fire at Brown University over the weekend, killing at least two people and wounding nine others, officials announced.

Providence Police Department Chief Col. Oscar Perez said Sunday that the individual detained is a man in his 20s. Authorities are not currently searching for anyone else in the case.

The attack took place one day earlier at the Providence, Rhode Island, school at about 4 p.m., law enforcement said, prompting a shelter-in-place order that forced students and faculty to spend the night on campus.

Providence Mayor Brett Smiley later told reporters that of the nine people shot, one has been discharged, one remained in critical condition and the other seven victims were in stable condition.

Officials have not yet released the names of those who were killed. Smiley also said that not all the victims' families have been notified as of early Sunday afternoon.