Cambridge, Massachusetts:
Police at the Massachusetts Institute of Technology say a suspect in the fatal shooting of an officer is no longer on campus.
No arrests have been made in the MIT officer's shooting. The shooter is being sought.
But MIT said Friday on its website it's now "safe to resume normal activities."
Still, it's urging its 11,000 students to "remain vigilant." It had earlier warned them to stay indoors when the shooter was on campus.
The MIT officer was shot Thursday night on the prestigious university's campus just outside Boston. He was pronounced dead later at a hospital.
The shooting comes just days after twin bombings at the Boston Marathon finish line killed three people, wounded more than 180 others and led to an increase in security in the region.