Chicago police said that surveillance footage showed her entering the employees-only area just before 2:30 a.m., meaning her body was not found for another five hours.
Lyles appeared exhausted and collapsed on the track, visibly struggling to breathe. Medics swiftly attended to the Team USA sprinter, taking him away in a wheelchair.
While several Hamas commanders, including the group's military chief Mohammed Deif, have been killed by the Israeli military, there are no clues about Sinwar's current location.