A rescue underway for four people believed to be trapped inside a tunnel in Mission Valley was a false alarm, the San Diego Fire-Rescue Department (SDFD) confirmed.
Crews responded to the call around 3:51 p.m. on the 7400 block of Hazard Center Drive. The area is behind the Doubletree Hotel.
SDFD initially said a tunnel may have collapsed, trapping the people inside.
But as of just after 4 p.m., fire officials called off the rescue, confirming it was a false alarm.
They said a transient man who lives in a confined space beneath the bridge heard voices in his head calling for help.
Crews searching the space but did not find anyone.
