A Massachusetts Institute of Technology campus police officer was shot late Thursday evening and confirmed dead by the Cambridge Police Department, according to MIT’s student paper, The Tech. Suspects fled the campus and were engaged by police in Watertown, Mass., before one was taken into custody.

A shoot out — which involved explosive devices — between the suspects and police led to one being arrested and the other retreating into a neighborhood. Police are currently searching the area but have not yet caught the other suspect.

You can follow the Boston Police scanner here.

UPDATE: 11:32 p.m.

The Boston Globe is reporting the man taken into custody is a suspect in the Boston Marathon bombing.

UPDATE: 1:27 a.m.

During an impromptu press conference held in Watertown early Friday morning, Boston officials confirmed the first suspect was killed.

Officials still haven’t released the names of the two suspects, but they said in the press conference they are currently looking for the second suspect.

“We have a video from the 7/11 in Cambridge last night,” said Boston Police Commissioner Edward Davis. “He’s in a gray hoody sweatshirt. Caucasian male, with long curly brown hair. That’s the individual we’re looking for right now.”