SAN FRANCISCO >> A San Francisco International Airport official says oxygen tanks in an elderly woman’s bag caused a scare that led to a partial shutdown of a terminal and delayed several flights.

Airport spokesman Mike McCarron says security screeners saw two metal cylinders with wires attached during an X-ray scan of the woman’s bag.

McCarron says the woman told screeners she didn’t know what was in the bag because she hadn’t packed it herself.

The security checkpoint for Delta Airlines flights was closed off around 11:30 a.m. Friday, and a bomb squad was called to the scene.

The checkpoint was reopened when it was determined the tanks posed no danger. McCarron says the woman was allowed to continue on her travels.

A Delta spokesman says the shutdown delayed six flights.