GARDEN CITY, N.Y. (CBSNewYork/AP) — An 11-year-old boy was seriously injured after police said he fell 30 feet from an escalator at a Long Island mall.

The boy was inside a Neiman Marcus store in the Roosevelt Field Mall in Garden City on Sunday and was hanging onto the outside portion of an escalator’s railing as it was moving upward, Nassau County police said Monday. When he reached the top floor, police say he fell about 30 feet and struck his 33-year-old mother, who injured her foot.

Both victims were taken to a hospital, where the boy is listed in serious condition with a head injury.

A spokeswoman for Neiman Marcus said the company is reviewing the incident to see if any additional safety measures are needed for the store.

(TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)