SAN FRANCISCO—The San Francisco Police Department has released video footage of several robberies that occurred on the 2100 block of Chestnut Street at several Apple stores in the Marina District. Authorities are hoping the footage will help to capture the suspects involved in the thefts.

The first robbery occurred on Black Friday, November 25 at 5:40 p.m. The second occurred on Tuesday, November 29 at 6:20 p.m. Both robberies lasted between 11 and 16 seconds. There were no reports of any injuries to customers during the robberies.

Video footage shows hooded suspects stealing iPhones and iPads from the display tables within the store. Police have not confirmed if both robberies are connected.  The first robbery shows three individuals while the second shows a fourth. Officer Carlos Manfredi of the SFPD, tweeted, “#SFPD searching for suspects involved in 2 commercial grand thefts that took place on the 2100 block of Chestnut St.”

The SFPD has identified iPhones as the hardest item to track. The display iPhones used in the store, are most likely without “any ID lock” noted Officer Manfredi.

Authorities believe the string of robberies may be connected to a theft ring. The robberies have been categorized as “commercial grant theft.” Similar incidents have occurred at Apple stores in Berkeley, Burlingame, Los Gatos and Corte Madera where merchandise totaling $40,000 was stolen.

The Corte Madera Police Department and San Francisco Police Department are actively seeking any information from the public to identify the suspects involved in the crimes.