Apparent human "skeletal remains" were recovered Wednesday in a Florida wildlife preserve where the search for Brian Laundrie has centered, police told ABC News on Thursday.

“We have confirmed skeletal remains," said Josh Taylor, spokesman for the North Port, Florida, Police Department.

Asked of media reports describing portions of the remains recovered, Taylor said, "We have not said anything about a skull.”

Dr. Russell Vega, the chief medical examiner for Florida’s 12th District, confirmed to ABC News that he is working on trying to identify the apparent human remains found Wednesday in a nature preserve along with Brian Laundrie's backpack and notebook.

Vega said it could take several days to identify the remains. He declined to confirm media reports that the remains discovered at the Myakkahatchee Creek Environmental Park in North Port, Florida, were bones.

Early in the search for Laundrie, FBI agents collected samples of Laundrie's DNA from his parents home in North Port, according to the Laundrie family attorney.

Steven Bertolino, the family attorney for the Laundrie family, spoke with New York ABC station WABC Wednesday evening after law enforcement found human remains and items belonging to the fugitive at a Florida park.

The attorney said the area where investigators found Brian's belongings was shown to police two weeks ago when Laundrie's father, Chris, aided in the search.

"I can't say for certain that Chris showed this particular area to police at that point in time, but I can say that this is an area that we initially notified the FBI that Brian liked hiking," Bertolino said.

The attorney said the family is waiting for a proper identification before making any comments.

"As you can imagine, the parents are very distraught. ... At this moment in time they're grieving," he said.

Police have recovered apparent human remains that have not been identified in the search for Brian Laundrie, the FBI said Wednesday.

Authorities also found items belonging to Laundrie, like a backpack and notebook, officials said.

FBI Special Agent in Charge Michael McPherson said the area where the items were found had previously been underwater. McPherson said a team would be on site for several days processing the scene.

The Moab, Utah, police department has released a report from a second witness claiming he saw Gabby Petito and Brian Laundrie engaged in a domestic dispute in Moab on Aug. 12.

The witness told police he observed a man and a woman, later identified Petito and Laundrie, arguing over a cellphone about 4:30 in the afternoon outside a grocery store in Moab, according to a statement from police.

"They were talking aggressively @ each other & something seemed off. At one point they were sort of fighting over a phone -- I think the male took the female's phone. It appeared that he didn't want her in the white van. He got into the driver's seat & she followed him. At one point she was punching him in the arm and/or face & trying to get into the van," the witness wrote in the police report.

The witness, according to the statement, said the woman eventually climbed over the driver to get into the passenger seat and that she was overheard saying, "Why do you have to be so mean"?

"I wasn't sure how serious this was -- it was hard to tell if it was sort of play fighting, but from my point of view something definitely didn't seem right. It was as if this guy was trying to leave her, and maybe take her phone? Not sure but wanted to help out," the witness wrote.

Around the same time, a 911 caller told a Grand County, Utah, Sheriff's Office dispatcher that he witnessed Laundrie allegedly "slapping" Petito and chasing her up and down a sidewalk hitting her, according to a recording released by the sheriff's office.