Shooting at Jackson Fitness Center leaves as many as 20 people hurt . He said he ran out and did n't see the gunman or others . Shooter reportedly among those who are dead . Witness says shooter targeted Latin dance class . Jackson is in Jackson Township , Michigan .
Shooting at Jackson Fitness Center leaves as many as 20 people hurt . Shooter reportedly among those who are dead . Witness says shooter targeted Latin dance class . Jackson is in Jackson Township , Michigan .