Ciara Mageean, an Irish athlete and European champion, has died at the age of 34, Al Jazeera English reported. According to the report, she died after a battle with cancer. She revealed her diagnosis a year before her death, the outlet said. The report says she competed at two Olympic Games. It is a single-source report and has not been independently verified. The date, place and circumstances of her death, the type of cancer, any statements from her family, federation or officials, and funeral or memorial arrangements are not yet known.