Montgomery County police are investigating a “mass theft” from a Silver Spring 7-Eleven store that involved as many as 50 people and are seeking help identifying people seen in the store’s surveillance video, police announced Monday.

Video from the security camera shows dozens of people flooding into the store around 11:20 p.m. Saturday. Many can be seen waiting in line at the store’s front counter. Items like snacks and drinks were taken from the store but police do not know the value of items taken.

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When police arrived at the store, located at 12257 Tech Road, they spoke with six teenagers standing near the store. Each of the teens had items from 7-Eleven but none could provide a receipt for the items.

“At the time we didn’t have enough probably cause to make an arrest,” Officer Janelle Smith, a department spokeswoman said. “The detectives were really waiting for the video.”

Officers took down the suspects’ identifying information and are continuing to investigate the incident.

This is the second such incident reported at a 7-Eleven store in the county this year. In August, a group of teens and young adults entered a Germantown 7-Eleven store together and stole approximately $450 worth of items.

Police identified and charged the majority of the 25 people caught on camera inside the store during the theft.

In both incidents, police have refrained from calling the thefts “flash mobs” as the incidents were not orchestrated through social media networks. Montgomery County police believe this weekend’s “mass theft” may have involved teenagers who attended a nearby birthday party that officers were called to earlier in the night.