A professor at the University of Massachusetts at Boston has been arrested for allegedly plotting to carry out a terror attack in Boston.
In a statement issued Friday, UMass said it was aware of reports that a student had been arrested in connection with an online manifesto allegedly written by a professor.
The university added that it was cooperating with federal and state authorities.
The university added the suspect is a professor at UMass.
Boston University was placed on lockdown Friday morning as police investigated a potential threat.
The lockdown was lifted at 7:45 a.m.
EDT (2:45 p.m., Friday).
Boston Police Commissioner William Evans called it a “serious incident” and urged students to stay home.
“This is a serious matter and it is very, very concerning,” Evans said at a news conference.
“This is an act of violence and we are going to pursue it as aggressively as we can.”
Boston Mayor Martin Walsh said he was briefed on the situation by FBI officials.
He also tweeted that authorities were working to determine the motive.
“I was briefed about the investigation by the FBI today and we’ll get the facts out as soon as we are able to,” Walsh said.
A video posted to YouTube on Saturday purportedly shows a person wearing a mask speaking with an English accent and carrying a backpack.
The video shows a man walking down a hallway toward the basement of a dormitory.
It appears to show a backpack with what appears to be an improvised explosive device.
The man then turns around and walks back into the hallway.
A police spokesman said authorities were “working very closely” with the FBI and other law enforcement agencies in the area to determine what the suspect may have been planning.
“As we understand it, this individual has an interest in targeting individuals or organizations of interest to the United States,” the spokesman said.
“We’re working closely with the Boston Police Department and other local and federal law enforcement partners in our investigation.”
Police said a backpack was recovered from the basement, which is not far from the dormitory, at approximately 2:30 a.d. local time, the time it takes to drive to a certain location from the city center.
Authorities are investigating whether the backpack had explosives inside it.
Authorities have been investigating a possible terror threat on college campuses in the United Kingdom since the December attack on a packed London subway station that killed 52 people.