PHILADELPHIA (CBS) -- An entire block in Philadelphia's Mayfair section was evacuated after police discovered a potentially explosive device on Sunday.
Police received a 911 call just after 4:30 p.m. reporting a person with a gun at a home on the 4200 block of Cottman Avenue.
Once they were inside, police say they found a cardboard box with fuses coming out of it.
Authorities evacuated the block and notified the bomb squad.
This is a developing story that will be updated as more information comes into our newsroom.
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