The Vatican's children's hospital is calling an Associated Press investigation into quality of care problems a "hoax."

In a statement Monday, the Bambino Gesù Pediatric Hospital again threatened legal action against AP for what it said was a report containing "false, dated and gravely defamatory" accusations that it said had been disproven by a Vatican probe.

AP uncovered two previously unknown Vatican investigations into the hospital: One three-month probe in 2014 interviewed dozens of current and former employees, gathered hospital documentation and concluded that the hospital's mission had been lost under its past administration and was "today more aimed at profit than on caring for children."