An active shooter was reported on or near the campus of Brown University in Providence, Rhode Island, the university’s public safety department said this afternoon.

Researchers who study active shooter incidents say the Brown University shooting is highly unusual, based on decades of data examining similar attacks across the United States. Dr. Kyle Gamache and Dr. Matt Zaitchik, psychology professors at Roger Williams University, have published two studies analyzing nearly 150 active shooter events nationwide.

: A heavy police presence was reported at Independence Mall in Wilmington, North Carolina, on Tuesday following unconfirmed reports of an active shooter. The mall is located at 3500 Oleander Drive.The Wilmington Police Department has confirmed that authorities are investigating reports of a person with a gun at the mall.

A gunman killed two people and injured nine others when he opened fire at Brown University’s engineering and physics building in Providence, Rhode Island, on Saturday, officials said.

I can’t think of a single incident where the shooter was able to walk away and be completely unknown and still be at large four days later,” a Roger Williams University professor said.

Police respond to active shooter situation at Brown University in Rhode Island. Suspect is in custody. Updates to follow.

Two people were killed and nine were wounded after a shooter opened fire at Brown University on Saturday, officials said.

An active shooter was reported on the campus of Brown University in Providence, Rhode Island on Saturday night.

Luke Air Force Base near Glendale, Arizona, reported an active shooter on Friday. The base is currently under lockdown.