Police have issued an arrest warrant for the suspect in a mass shooting at Brown University that killed two people and injured nine others, sources close to the investigation told CBS News.

Authorities are actively searching for the individual and a rental car believed to be associated with the suspect. The identity of the suspect has not yet been made public, as the investigation continues.

As the search enters its sixth day, law enforcement officials are conducting door-to-door inquiries, seeking home security footage, and appealing to the community for tips that might lead to the gunman’s capture.

A previously scheduled news conference was canceled unexpectedly, but police indicated they would provide an update shortly after. Notably, investigators are examining the potential connection between the Brown University incident and the recent shooting death of an MIT nuclear engineering professor, Nuno F Gomes Loureiro, found shot at his residence in Brookline, Massachusetts.

Authorities confirmed that a rental car matching descriptions found at both crime scenes was reported. Initially, police had stated there was no link between the two incidents, but new developments have led them to reconsider.

Providence Police Chief Oscar Perez has stated they are pursuing a person of interest who may hold crucial information regarding the case, especially after releasing security footage of a man wearing a black mask near the university campus. The chief has expressed concern that the suspect "could be anywhere," emphasizing the urgency of their investigation.

The public's heightened anxiety about the situation has been palpable, with frustrations voiced over the progress of the investigation. Rhode Island Attorney General Peter Neronha remains optimistic, believing they will eventually apprehend the perpetrator.

The FBI has announced a $50,000 reward for information leading to an arrest and conviction related to this tragic event, which unfolded at Brown University during finals. The victims have been identified as Ella Cook, a sophomore from Alabama, and Mukhammad Aziz Umurzokov, a freshman student originally from Uzbekistan.