Police investigate link between Brown University shooting and assassination

The mass shootingat Brown University that left two students dead may be linked to the fatal shooting of a senior MIT professor two days later, police have said.Investigators are examining whether the same gunman carried out both attacks.Officers have released CCTV images of a person of interest and widened the manhunt to Salem, New Hampshire, around 85 miles from the Brown campus, as the suspect remains on the run and no arrests have been made.