SKYWATCH INCIDENT REPORT PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON Date: 02:55 11/09/2023 Paged: YES Status: Closed POD: DEN Reporting Facility: ZME REMARKS Multiple aircraft reported an unidentified aerial phenomenon while at FL280/340/450. Object was on ARG324080 between FL900 and FL500 and reported as changing altitudes erratically. The unknown phenomenon had flashing lights. SKYWATCH INCIDENT REPORT | DATE: 2023-11-09T02:55 | POD: DEN | PAGE 1 of 1