Two shooting within hours of each other are under investigation Sunday morning in Colorado Springs.

Police say the shootings are not related.

Officers were first called to the 3100 block of East Dale Street at 3 a.m. on reports of shots fired in the Pinewood apartment complex parking lot.

"RP [reporting party] is on the third floor, says heard gunshots, says heard gunshots coming from the second floor. There is a female screaming and vehicles leaving." - Police dispatch

"I heard what I believe sounded like a 'pop, pop, pop,' and it woke my dog up, which woke me up," said Zachary Protsman, who lives at Pinewood Apartments.

There were no victims when police arrived on scene, but not long after getting to the complex, officers were alerted that two teens -- a boy and a girl -- had arrived at an area hospital with gunshot wounds. Both are expected to survive.

Colorado Springs Police Department spokesperson Lt. Howard Black says the incident started as a disturbance inside one of the apartments, then spilled outside, where shots were fired.

"This was a scene that was in a parking lot. Those are relatively -- can be -- quick scenes to deal," Black said.

Just three hours later and seven minutes down the road, shots rang out at another apartment complex.

"We have a person shot laying outside of 2525 Verde Drive." - Police dispatch

A man was shot multiple times following an argument that stemmed from a party hours before, Black told 11 News.

"This was a carryover from some conversation that occurred the night before," he said.

The victim had left the party following the argument, but came back sometime later and tried to re-enter the home, Black said. He was shot several times.

"Sometimes out of anger we make a choice, our lives now have changed for the rest of our lives," Black said.

The victim was last reported to be in critical condition.

Black said in both cases, they know the people involved. He stopped short of saying whether anyone was in custody.