GARDEN CITY, N.Y. — A police official involved in the investigation of four bodies discovered along a seaside road said today it appeared unlikely that Megan Waterman of Scarborough, Maine, was among the four.

However, said Deputy Inspector William Neubauer, there has been no official confirmation ruling her out.

Waterman, who advertised escort services online on Craigslist, was last seen in June at a hotel in Hauppauge, N.Y., about 15 miles from where the bodies were found.

Authorities have obtained a DNA sample from Waterman’s mother.

It is also unlikely that additional bodies will be found along a seaside road where the corpses were discovered in recent days, Neubauer said, emphasizing that detectives remain open to any scenario to explain their discovery.

Despite comments earlier in the week from Suffolk County Police Commissioner Richard Dormer that it appeared possible the deaths of the four women were the result of a serial killer, Neubauer told reporters today that detectives were not limiting themselves to any theory.

“We have no idea whatsoever whether we’re dealing with a serial killer,” he said. “Anything is possible at this point, because there’s so many unanswered questions.”

Neubauer said an expanded search of a 15-mile stretch of Ocean Parkway, where the bodies were found, was nearing its conclusion, adding “the likelihood of finding further remains is remote.”

Detectives believe the four women died elsewhere and were then taken to the site, a narrow strip of land that divides the Great South Bay from the ocean. The parkway connects Jones Beach with several state- and town-run beaches to its east along the south shore of Long Island.

Neubauer reiterated today that police have no suspects and that it could take weeks to determine the identities of the four women. The New York City medical examiner is helping the identification process.

Police on Thursday eliminated a missing New Jersey woman last seen working as a Craigslist escort as a possible victim after comparing her medical records with those of the four victims.