Three metro Atlanta police departments are working together to try to catch the same suspect, who they believe robbed a trio of cellphone stores at gunpoint.

Atlanta, Cobb County and East Point police believe one man ties all three crimes together, Channel 2 Action News reported.

“We do believe at some point or somehow all these cases are connected,” East Point Sgt. Ebony Bullock told Channel 2.

The first robbery was on January 4 at an AT&T store off Piedmont Road in northeast Atlanta, according to a police incident report obtained by AJC.com.

These are surveillance photos of the AT&T store robbery suspect.

Credit: Atlanta Police Department

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Credit: Atlanta Police Department

Surveillance video shows the suspect force an employee into a back room and demand iPhones. He allegedly got away with about 30 cellphones, according to the report.

On May 18, the same suspect is accused of robbing a T-Mobile store near Marietta, Channel 2 reported. Surveillance cameras also allegedly caught him during the act.

MORE: Cops: armed robber took cell phones from Cobb T-Mobile store

The most recent robbery was May 25 at a T-Mobile store off Cleveland Avenue, Bullock said. This incident happened before noon with a different suspect walking through the door with a gun drawn, stealing more than 20 iPhones.

This is the suspect accused of robbing the T-Mobile store in East Point on May 25.

Credit: Channel 2 Action News

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Credit: Channel 2 Action News

While the suspect who committed the East Point robbery is believed to be a different person, Bullock told Channel 2 the getaway car is likely the same as the one used in the Cobb robbery.

“They’ve shown a pattern that they haven’t stopped just yet, so yes, it is a possibility that they could strike somewhere else in the metro Atlanta area,” she said.

This is the vehicle East Point police believes ties their T-Mobile robbery to the robbery in Cobb County a week earlier.

Credit: Channel 2 Action News

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Credit: Channel 2 Action News

T-Mobile is offering a $3,000 reward for anyone who provides information that helps solve this case, the news station reported.

Anyone with information is asked to contact one of the three police departments or CrimeStoppers at 404-577-8477 or online at www.StopCrimeATL.com. Tips can be sent anonymously, and information that leads to an arrest and indictment in this investigation can earn tipsters up to $2,000.

In other news:

Gwinnett County police are investigating a double homicide inside a Buford-area apartment complex.