The first occurred around 9 p.m. at the 7-Eleven in the Wynnewood section of Lower Merion Township.
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Police say the suspects fled with cash.
Around a half-hour later, the Lukoil gas station at City and Belmont avenues in Philadelphia's Wynnefield Heights section was robbed.
It is unclear what was stolen in that robbery.
No injuries were reported in either incident.
These crimes are in addition to the armed robbery at the 7-Eleven at Rising Sun and Wyoming avenues in Olney which occurred around 11:15 p.m. Sunday.
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7-Eleven armed robbery suspects arrested after foot chase
Two suspects were arrested in connection to that robbery after a brief foot chase with police.
Detectives have not said whether any or if all three of these robberies might be connected.
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