Two women in Kennewick, Wash, were hospitalized with Legionnaires’ disease, which may be connected to a gym in the area where both women were members, according to the Tri-City Herald.

Membership at Gold’s Gym in Kennewick is the only thing health district officials have found so far that the two women have in common. The investigation was in its early stages Wednesday and the disease has not been conclusively linked to the gym.

Both women, who are in their 70s and 80s, have been discharged from the hospital and are recovering.