It happened just after 12:30 a.m. on the 4100 block of Roosevelt Boulevard in the city's Lawncrest neighborhood.
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According to police, the incident began when an officer stopped a black Nissan traveling southbound in the northbound lanes.
While investigating this incident, police say a blue Honda traveling northbound rear-ended the officer's patrol vehicle.
The drivers of the Nissan and Honda were arrested and are suspected of driving under the influence, according to police.
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The officer was not injured during the crash.
Anyone with information on this incident is asked to contact Philadelphia police.