A series of shots rang out late Thursday on North Sixth Avenue between West Penn and Woods streets in Butler's West End neighborhood.

Butler police aren't talking. Neighbors are.

“It's made me very nervous,” said Candace Boulanger, who heard the shots outside her window about 10:30 p.m.

“I heard these pop, pop, pop, pops,” she said.

She looked outside and saw a white car out front traveling in reverse toward West Penn Street.

Moments later, she noticed a white sport utility vehicle travel by, crossing over West Penn Street and continuing on North Sixth Avenue.

Boulanger's account was similar to those of several other neighbors, who did not want to give their names. They described hearing four or five shots.

Neighbors also reported hearing a woman's screams after the gunfire. They couldn't make out for certain what she was saying.

“I saw three girls and a guy and a baby in a stroller,” said one man who was upstairs in bed watching TV.

Another man, also in bed watching TV, heard the consecutive shots. He said his wife looked outside the window and saw a white sedan.

She noticed a “tall man” in front of the car. The man “hurried up,” according to the neighbor, “and got into the passenger side of the car. The car went in reverse and left.”

The unknown woman's screaming followed. The screams, neighbors recalled, seemed to be coming from the road closer to Wood Street.

“There was a lady with a baby carriage,” the neighbor said, “and a couple other people.”

Following the shooting, homeowners ventured outside to talk among themselves. Some spotted shell casings.

One woman counted two spent casings along the side of the street with the odd numbered homes, and two more casings on the sidewalk nearby.

“They looked like .380 (caliber) or 9 mm,” another neighbor said of the casings.

Police eventually got there and marked the casings before taking them into evidence. They also spoke to neighbors and asked to see the video from those homes with security cameras.

It was not known if the review of surveillance footage benefitted the investigation.

Butler police Deputy Chief David Adam on Friday morning declined to comment about the investigation. He did say, however, that as of 7:30 a.m., no arrests have been made and no charges filed.

The overnight district judge also did not immediately sign any search warrants.

Butler Township police only would confirm they assisted city police.

Calls on the police scanner at the time of the incident indicated that authorities were searching for a white Chrysler. The significance of that vehicle was not clear.

Adam said police may issue a news release about their investigation later.

Boulanger, like her other neighbors, is curious about the investigation. The neighborhood is itching for answers to obvious questions.

“What happened here,” Boulanger said, “is unusual for this street.”