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 now searching for the individual and a car believed to be rented by the suspect. The suspect has not been publicly identified.

Currently, law enforcement is also exploring a possible link between the Brown shooting and the murder of a professor at the Massachusetts Institute of Technology two days later.

This ongoing investigation is in its sixth day, with officials reaching out to the community, asking for home-security footage and tips regarding the gunman.

A news conference scheduled by police in Providence, Rhode Island, was unexpectedly canceled, but updates are expected later in the day.

Authorities mentioned that they are investigating any potential connections between the campus shooting and the murder of MIT professor Nuno F Gomes Loureiro, who was shot multiple times on Monday at his home in Brookline, Massachusetts, situated about 50 miles from Providence.

Police have reportedly matched a rental vehicle seen at both crime scenes to the suspect. While federal authorities had previously stated there was no connection between the two incidents, the situation is under further scrutiny.

On Wednesday, investigators released a photo of a person who may possess vital information pertinent to the case.

Police Chief Oscar Perez emphasized that the suspect 'could be anywhere' and is yet to be apprehended.

Footage from earlier in the investigation showed a person of interest spotted near the university, prompting concern as they may have been surveying the area before the shooting.

Public frustration has amplified due to a perceived lack of progress in the investigation. However, Rhode Island Attorney General Peter Neronha reassured that law enforcement is dedicated to capturing the individual responsible for this tragic event.

The Federal Bureau of Investigation has placed a reward of $50,000 for information leading to the identification, arrest, and conviction of the assailant.

The horrific incident unfolded at Brown University's Barus & Holley engineering building during final examinations, with the two deceased students being identified as sophomore Ella Cook from Alabama and freshman Mukhammad Aziz Umurzokov, an Uzbek-American.