CLEVELAND, OHIO - OCTOBER 15: A Frontier Airlines plane lands at Cleveland Hopkins Airport on October 15, 2014 in Cleveland, Ohio. Recently diagnosed Ebola patient, health care worker Amber Vinson, traveled on Frontier Airlines from Dallas to Cleveland with a low fever on October 10, and returned to Dallas on October 13. The aircraft has since been decontaminated and put back in service. Nurse Amber Vinson joins Nina Pham as health workers who have contracted the Ebola virus at Texas Heath Presbyterian Hospital while treating patient Thomas Eric Duncan, who has since died. (Photo by Michael Francis McElroy/Getty Images)

NEW YORK, Oct 16 (Reuters) - Frontier Airlines said six crew members were placed on paid leave for 21 days "out of an abundance of caution," after learning that a nurse who had treated an Ebola victim may have been symptomatic when she flew on the airline earlier this week.

The leave affects two pilots and four flight attendants aboard flight 1143 from Cleveland to Dallas/Fort Worth on Oct. 13, which carried a Texas nurse who later tested positive for the deadly virus, Frontier said in statement late Wednesday.

The Centers for Disease Control had informed the airline Wednesday that the nurse "may have been symptomatic earlier than initially suspected, including the possibility of possessing symptoms while on board the flight," the statement said.