Two masked men were caught on surveillance camera trying to commit an armed robbery while using an ax to open an ATM inside a Philadelphia convenience store, police said. 

The suspects went inside the store in the city's Eastwick section on Friday just before 6 a.m., the Philadelphia Police Department said. One of them is seen holding a handgun and the other was carrying a box with the ax inside. 

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The man with the gun demands money from the store clerk while the other attempts to break open an ATM with the ax with a few swings. 

Both suspects are seen standing and looking at the money machine when it fails to open. 

They eventually flee the store empty-handed, police said. Authorities are trying to identify them.