  We report the classification of 24 puzzling short-period variable stars
located in OGLE-IV Galactic bulge fields. The stars are low-amplitude (<0.05
mag) multi-periodic objects with dominant periods between 22 and 54 min whose
type could not have been unambiguously established based on photometry only. A
low-resolution spectroscopic follow-up has shown that all the objects are main
sequence A/F-type stars. Thus, all the variables are delta Sct-type pulsators.
We have added them to the OGLE-IV Collection of Variable Stars.
