The Navy said Tuesday that a report of three gunshots heard in the basement of a building at Naval Medical Center San Diego came from a single witness.
The Facebook page for the Naval Medical Center San Diego posted a stark warning for people in the area in the last hour after gunshots were heard.
San Diego police Officer Travis Easter said police received a notification call from military police at 8:03 a.m. of shots fired but assistance was not requested.
An initial sweep of the balboa Park complex showed no evidence of gunfire, Navy officials said. Investigators are working on a second search.