Attacker used a knife and car. To me this says it was likely spur of the moment rather than planned. (Choice of weapon doesn't necessarily imply level of planning, but my initial judgement with the information available now)
Press conference underway. Apparently the attacker did not use a gun; the only shots fired were by police. Attacker rammed into pedestrians with car and then attacked w/knife
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The Buckeye community is tough as hell, so I know they have the strength to get through this. For what it's worth, they have my thoughts.
Everyone else is reporting that the attacker's name hasn't been released yet.