June 20 (UPI) -- The National Parks Service announced that three people died this week in two separate heat-related incidents at Grand Canyon National Park. Park rangers and emergency medical personnel responded to the two incidents, which occurred on June 12 and June 16, and both of which happened while hikers were on trails in the Inner Canyon, NPS said Friday in a press release . All three of the people were deceased when officials arrived, and they were transported with aerial support to