An FBI diver searches the water at Seccombe Lake Park after a shooting earlier this month in San Bernardino, California December 11, 2015.

FBI divers wrapped up a three-day search of a California lake where authorities suspect a couple inspired by ISIS may have dumped evidence linked to their massacre of 14 people, an official said on Sunday, adding the team retrieved some objects.

The search at the lake in a public park 2.5 miles (4 km) north of the site of the Dec. 2 shooting at a regional center in San Bernardino, began on Thursday after reports the suspects were spotted nearby either before or after the attack.

ABC News and other news organizations had reported that the divers at San Bernardino Lake were looking for a computer hard drive that belonged to the married couple, Syed Rizwan Farook, 28, and Tashfeen Malik, 29.

But FBI spokeswoman Laura Eimiller declined on Sunday to describe the objects or say whether they appeared to be connected to the mass shooting.

“We have not commented on the items, or whether they are case-related, due to the ongoing investigation,” Eimiller said, responding to a media report the objects retrieved in the search were not tied to the crimes under investigation.

“Divers tend to find all sorts of items in public lakes,” she said, and any objects found “will be analyzed for evidentiary value in this case.”

U.S. officials have said their investigation has yet to turn up evidence that foreign militants directed Farook or Malik when they stormed a holiday gathering of Farook’s co-workers and opened fire with assault rifles.