Jamie Zimmerman, a doctor who was a reporter with ABC News’ medical unit, drowned while on vacation in Hawaii.

ABC News president James Goldstone told staff of the sad news this morning. “According to police, she was alone at the time and was apparently attempting to cross the Lumahai River in Kauai’s North Shore when she lost her footing and was swept out to sea,” Goldstone said. “It was a terrible and tragic accident.” Her mother confirmed Zimmerman’s death on her Facebook page.

“Jamie touched so many of us across ABC News,” Goldstone said in his memo to staff. “She reviewed studies and researched stories for the Medical Unit. But she did so much more for the people of ABC News – she was a champion of our Wellness initiative, offering meditation sessions that became a staple and a meaningful moment for the team to breathe and relax during the day.”

Details of a memorial service are pending.