WARREN, Mass. -- Another piece of bone fragment discovered Thursday in the ongoing search for missing teenage lifeguard Molly Bish was a right tibia bone, according to Worcester County District Attorney John Conte.

Speaking on the Warren Town Common late Friday afternoon, Conte said searchers located a right bone tibia in the same area that searchers have been combing all week. An upper arm bone that was found earlier in the week.

Searchers have been scouring a wooded area since a bathing suit was found about 5-miles from Cummins Pond, where Bish disappeared from her lifeguarding job in June 2000. Crews found one bone Tuesday, and another three on Wednesday that were determined to belong to a human age 14 to 20 years old.

Despite three years of fallen foliage, the bones were found close to the surface of the ground.

Conte said the state police lab has been unable to perform nuclear tests on some of the bones, but a second lab in Virginia has said it has obtained DNA.

"The feel that the sample that was sent to them will allow them to obtain nuclear DNA, along with mitrochondrial," said Conte, adding that investigators hope to have the DNA results by Monday.

He added that they have been unable to obtain DNA from the bathing suit that was also discovered in the woods, but they have obtained a DNA profile from hair that was found attached to a scrunchie discovered in the Quaboag River.

"Hopefully next week, we'll be able to do some comparisons," Conte said.

The district attorney added that the search crews, which have so far covered more than 26 acres, plan to return to the area Saturday to continue combing the woods.