No gunman found at US hospital

An initial inspection at Naval Medical Center San Diego has found no sign of a gunman or a shooting, the Navy says.

Navy spokesman N Scott Sutherland said military police had checked Building 26 after a person reported hearing three shots in the basement earlier in the day.

School officials said a lockdown has ended and instruction has resumed at three schools near the medical centre.

In addition, TV images showed uniformed Navy personnel walking outside the medical facility. Their hands were in the air and they were being patted down by base police as a precaution.

The Navy hospital previously said on its Facebook page that an active shooter was reported and people were told to run, hide or fight.