A pair of quadruple shootings in Philadelphia overnight has left six people in critical condition, including four teenagers who were targeted at an apartment complex where 21 shell casings were found, police say. 

In the second attack, a car with two 20-year-old women and two children inside was found riddled with at least 10 bullets, leaving both adults in critical condition and a 2-year-old boy with a gunshot wound to the leg, Fox29 Philadelphia reports. 

The first shooting, involving the four teenagers, happened around 2 a.m. Thursday in North Philadelphia. 

Investigators told Fox29 Philadelphia they believe the teens were standing near the home where two of the victims live when they were targeted. 

14-YEAR-OLD FACES MURDER CHARGE IN CONNECTION WITH TRAFFIC CONE BEATING OF ELDERLY PHILADELPHIA MAN 

North Philadelphia shooting

The quadruple shooting involving four teenagers happened around 2 a.m. Thursday at this apartment complex in North Philadelphia. (Google Maps)

In the courtyard of the Spring Garden Homes complex, first responders reportedly found 14- and 16-year-old girls with gunshot wounds to the face and two boys, ages 13 and 15, with injuries to the arms and legs. 

All four teens are in critical condition but are expected to survive, according to Fox29 Philadelphia. 

The second incident happened around 10:30 p.m. Wednesday in West Philadelphia. Police said the driver and passenger of the SUV, both 20-year-old women, were shot in both the back and the head. Police added both were hospitalized and in critical condition.  

Police cruiser in Philadelphia

Philadelphia Police have not yet publicly identified or arrested any suspects in either quadruple shooting. (iStock)

Two children were sitting in the back seats. A 2-year-old boy was hospitalized in stable condition after being shot in the leg. The other child, a 6-year-old boy, was not shot.  

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A block away, a man, 26, was shot in the leg on a street and was in critical condition. 

Philadelphia Police did not immediately respond to a request for comment Thursday morning from Fox News Digital. 

Fox News’ Brie Stimson contributed to this report.