Dallas ISD police officer shot, seriously injured, in parking lot of Northwest Dallas Sam's Club

A Dallas ISD police officer was shot and injured in the parking lot of a Sam's Club in Northwest Dallas late Thursday morning.

CBS News Texas's JD Miles reports that the officer suffered serious injuries and was taken to Parkland Hospital. The officer is expected to survive.

Early Thursday afternoon, Dallas ISD confirmed that one of its police officers was wounded "while assisting a citizen at an off-campus location," but provided no additional details. 

Video from the scene showed an officer examining a Dallas ISD police vehicle with multiple evidence markets around it in the parking lot of the Sam's Club on 635 and Midway Road.

Sammy Garcia, who was inside the Sam's Club with his daughter and granddaughter, told CBS News Texas's Marissa Armas that police kept shoppers inside the store for about 40 minutes. 

"They were very nervous, very scared of course. Never been in a situation like this," Garcia said.

A large area of the parking lot is closed off with crime scene tape, and officers could be seen looking for something in a nearby neighborhood.

This is a developing story and will be updated.