The shooting death of a Massachusetts Institute of Technology professor found in his Brookline home Monday night is being investigated as a homicide, officials said.

Nuno Loureiro, 47, was pronounced dead Tuesday morning.

“This is an active and ongoing homicide investigation,” the Norfolk District Attorney’s Office said.

Loureiro was a professor in MIT’s department of nuclear science and engineering and the department of physics and was also director of MIT’s Plasma Science and Fusion Center, the university said.

“Our deepest sympathies are with his family, students, colleagues, and all those who are grieving,” MIT said in a statement.

Loureiro’s research interests were “theory and computational simulation of nonlinear plasma dynamics,” according to his MIT bio.

He joined MIT in 2016. Before that, he was a researcher at the Institute for Plasmas and Nuclear Fusion at IST Lisbon, MIT said.

MIT said its police department is assisting in the investigation, which is being led by Massachusetts State Police.

The university, citing the investigation, said it would not have further comment.