The shooting death of a Massachusetts Institute of Technology professor at his home near Boston is being investigated as a homicide, authorities said Tuesday. Nuno Loureiro, 47, from Portugal, was pronounced dead Tuesday morning after he was found mortally wounded at his Brookline home Monday night.

Authorities identified Loureiro's shooter as Claudio Manuel Neves Valente, 48, a Portuguese national from Miami. Officials said he was born in Torres Novas, Santarem, Portugal and was a legal permanent resident of the United States.

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Fusion scientist Nuno Loureiro was fatally shot at his home in Brookline, Massachusetts, on Monday night. The Massachusetts Institute of Technology professor died from his injuries at a local hospital on Tuesday.