Police said the gunman was among the dead.
The suspect, driving a black BMW, opened fire on pedestrians from his vehicle at several locations in the town last night, is among those killed.
Police received their first emergency calls about the shooting around 9:30 pm local time on Friday.
Twice, the shooter exchanged gunfire with police from his car, and fled both times.
He then crashed into a parked vehicle. When police approached him they "determined that the suspect ... was dead of an apparent gunshot wound to the head," Brown said.
Police recovered a handgun from the suspect's vehicle.
Authorities believe that the shooter acted alone, and said they are investigating a threatening video posted by the alleged shooter on YouTube as evidence.
Police are "analysing both written and videotaped evidence that suggest this atrocity was a premeditated mass murder," Brown told reporters.
Authorities have not yet released the suspect's name.
"We have identified nine separate crime scenes," Brown said, describing the situation in the streets of the college town at an early morning press conference as "chaotic."