FBI agent Christopher Combs said Sunday that federal investigators believe the gunman had no connection to terrorism. Authorities say they've identified the gunman but refused to publicly say his name at a news conference.

Police eventually killed the shooter. Authorities told reporters that the gunman had a criminal record but did not elaborate.

  

The shooting began with Texas state troopers pulling over a driver for failing to signal a left turn. One trooper was shot, but authorities say he's expected to recover.

  

Police say those killed in Saturday's attack were between the ages of 15 and 57 years old. Authorities say they're processing more than 15 scenes in the investigation.