Police Identify Portuguese National as Suspect in Brown University Mass Shooting, Launch Manhunt in Killing of MIT Professor

Authorities have launched an expanding manhunt after multiple outlets reported that Providence law enforcement identified a suspect and issued an arrest warrant in the Brown University mass shooting that killed two students and wounded nine.

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ABC News

Mainstream outlets described active searches and appeals for public tips.

ABC News

Several local and national outlets reported the suspect is a Portuguese national.

Investigators are examining links to a rented vehicle seen near crime scenes.

Officials said investigators are canvassing areas including neighboring New Hampshire as the inquiry continues.

Investigators described a fast-moving, evidence-focused probe into the Brown attack.

Police canvassed neighborhoods, collected DNA swabs, and asked for home-security and dashcam footage.

ABC News

They released enhanced images and maps showing where a person of interest was seen.

Authorities said they were sifting through hundreds of tips and searching for a rented vehicle believed to be associated with the attack.

Reporting noted physical evidence, including shell casings and other forensic material, was being processed as part of the manhunt.

Two days after the Brown attack, MIT professor and fusion scientist Nuno F.G. Loureiro, 47, was found shot at his Brookline home and later died, prompting a separate homicide investigation.

“Police stepped up their search Wednesday for a suspect in the killing of Nuno F”

AP News

Authorities reported shell casings and wall impacts at the scene and canvassed the neighborhood for surveillance video.

Officials said no suspects were in custody while the probe remained active.

Loureiro, who joined MIT in 2016 and was named director of the Plasma Science and Fusion Center in 2024, was mourned by colleagues and public officials as investigators intensified searches and reviewed records for leads.

Whether the Brown and Brookline killings are connected remains disputed in reporting.

Several mainstream sources, led by law-enforcement statements, said the FBI and investigators saw no known link at certain points.

Associated Press

Some local and partisan outlets reported an emerging connection and identified a suspect nationality.

Tabloids cited speculative claims that linked the MIT killing to possible foreign actors.

Officials and U.S. investigators had not corroborated those claims in the reporting provided.

Community and official reactions diverged in tone across coverage.

“The article reports on the death of physicist Loureiro, whose students visited his apartment to pay their respects”

BBC

Mainstream and local outlets emphasized restraint, counseling and verified updates as police urged the public to avoid speculation.

BBC

Alternative and tabloid outlets foregrounded alleged leads and nationality claims.

MIT leaders, Portuguese officials and colleagues described Loureiro as a respected mentor and lauded his scientific work.

Candlelight vigils, increased security in Brookline and campus outreach were widely reported as officials asked for patience while forensic work and canvassing continued.