No known suspects as authorities still searching for Brown University shooter

Authorities are again searching for the person seen on video walking away from the Brown University shooting that killed two students and injured nine.

Officials said late Sunday that they released a person of interest they had detained earlier in the day, finding no reason to keep him in custody.

This setback leaves law enforcement without a known suspect.

The shooting happened Saturday during a busy time on campus, causing chaos and a lockdown.

Brown canceled all remaining classes and exams for the semester.