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"Thanks to our partner agencies tonight for help in keeping the downtown area safe," HPD tweeted.
Video shows the windows of the Forever21 store at the Galleria that looters smashed in an attempt to break in.
Police were nearby when the incident happened and detained seven people outside.
Protests and unrest forced the Galleria to close Sunday for safety reasons.
Thanks to our partner agencies tonite for help in keeping the downtown area safe. More than 100 individuals were arrested on various offenses.— Houston Police (@houstonpolice) May 31, 2020
Exec Asst Chief @MattSlinkard (right) speaks with Chief @ArtAcevedo & @SheriffEd_HCSO (left) at an arrest site.#hounews pic.twitter.com/0MM2d94vUX