NEW YORK - Authorities searching for the man who

killed two Brown University students

over the weekend shared enhanced video footage on the evening of Dec 16 in an effort to generate new leads on the attacker.

The gunman remains at large more than three days after the shooting, which killed two students and injured nine others, and authorities said they have no specific suspects, and no indication of a possible motive.

“We don’t yet know who we’re looking for,” said Attorney-General Peter Neronha of Rhode Island. He said that “once we identify who this person is, I believe we’ll be able to locate him. It’s very hard to hide in this country.”

Officials hoped that the new footage, which included a timeline of a man circulating in neighborhoods close to campus, would help someone recognise him. But the man’s face remained covered in all of the images released on Dec 17.

“Focus on the body movements, the way the person moved their arms, the body posture, the way they carry the weight,” said Colonel Oscar Perez, chief of the Providence, Rhode Island, police department.

“I think those are important movement patterns that may help you identify this individual, which is extremely important.”

The

video footage shared by the police

on Dec 17 showed that the possible shooter was walking through a residential area near the university as early as 10.30am the day of the shooting, which happened around 4pm in a...