  Blue Large-Amplitude Pulsators (BLAPs) form a mysterious class of variable
stars with typical periods of tens of minutes and amplitudes above 0.1 mag. In
this work, we present results of a variability search focused on timescales
shorter than 1 h, conducted in OGLE-IV Galactic disk fields containing about
1.1 billion stellar sources down to I$\approx$20 mag. Twenty-five BLAPs have
been detected, 20 of which are new discoveries. Their periods range from 8.4
min to 62.1 min. We have also found six new eclipsing binary systems with
orbital periods from 38.3 min to 121.3 min and five short-period
large-amplitude (> 0.17 mag in the I-band) variable stars of unknown type.
