The neon lights were aglow and the dancers were gyrating on the stage at Delilah's gentlemen's club in Old City at noon Tuesday, less than 24 hours after an attempted shooting in the parking lot.

Police were still trying to determine whether the gunfire, which twice struck a woman's truck as she was entering it, came from the fifth-floor window of an apartment building under construction across the street.

A Philadelphia police spokesman, Capt. Sekou Kinebrew, said authorities also were investigating whether the woman, who escaped injury, was the intended target. He declined to say whether that woman had any connection to Delilah's.

"We're not sure if the shots emanated from the vacant building," Kinebrew said. "We're not sure that the person who was most proximate to that car was the intended target."

A source close to the investigation, however, said police believe the shooter fired at Delilah's owner as she approached her car. The motive was unclear, the source said.

Attempts to reach Delilah's owner at her home and place of business on Tuesday were unsuccessful, and an attorney for the club did not return a request for comment.

The source also said police recovered surveillance video of a man believed to have been the shooter climbing onto Delilah's roof, then climbing down and heading toward the apartment building under construction a few hundred feet from the club.

Police received calls reporting the gunfire shortly after 6 p.m. Monday. Responding officers swarmed the area and shut down several ramps to I-95 as they searched for the gunman.

During a search of the apartment building under construction across the street on the 100 block of Spring Garden Street, police found "strike marks" on a fifth-floor window that faces the club's parking lot, Kinebrew said. Given that the building is under construction, the strike marks could have come from any number of instruments, but police were working to determine whether they were caused by gunfire, he said.

No casings were found in the building.

The plaza where Delilah's is located also houses an Enterprise Rent-A-Car and two bars, although it was unclear whether the drinking establishments are open for business. Police were culling surveillance video from the businesses, and investigators were analyzing the path of the bullet, Kinebrew said.

Police had no indication that anything that happened inside Delilah's on Monday led to gunfire in the parking lot, Kinebrew said.

Staff writer Michael Boren contributed to this article.