An MIT police officer was shot and killed in Cambridge Thursday evening and gunfire and potential explosive devices were reported in Watertown, according to media reports and audio on the local police scanner. The Boston Globe reported that one suspect in Monday’s marathon bombing had been captured while another was still on the loose in Watertown.

“There has been a shooting on the MIT campus with an officer wounded. There are multiple incidents with possible incendiary devices in Watertown,” Senior Vice President for Communications Ellen de Graffenreid wrote in a statement. “There is no threat to the Brandeis campus at this time. All students should stay inside their residence halls and off campus dwellings and report any suspicious activity. On campus, call 6-3333 or from a cell phone 781-736-3333. Off campus call 911. Anyone in the Watertown area should stay inside and follow law enforcement instructions.”

Just before 2 a.m., MIT’s website reported that the shooting suspect was no longer on campus.

“MIT Police have determined that the suspect in this evening’s shooting is no longer on campus,” the website stated. “It is now safe to resume normal activities. Please remain vigilant in the coming hours.”

FBI agents and the Cambridge bomb squad arrived at the scene in Watertown early Friday morning, the Boston Globe reported.

On Twitter, university officials cautioned students in Watertown to remain vigilant.

“Incidents in Watertown should not affect Brandeis campus. All students stay inside per Waltham PD instructions,” one post stated.

“Any Brandeis students, faculty, staff in Watertown area please stay inside, follow law enforcement instructions,” according to a post around 2 a.m.