NEWBURY (CBS) — Investigators are combing a Plum Island beach after human remains washed up on shore, officials said. 
 
 Update 12/16: Remains Identified As Man 
 
 Bill Barrett was walking his dog Saturday morning on the beach behind 28 Fordham Way when a woman looking through some debris found a bone. 
 
 “She called me over and said what do you think this is? It was a good sized bone. I said it looks like a leg bone,” Barrett told WBZ-TV’s Julie Loncich. 
 
 Barrett then saw his dog nudging something nearby. 
 
 “I walked over there and she had found another portion of the lower leg with a foot still attached and a sock on it,” Barrett said. “It’s a disturbing thing to find on your beach you walk every day.” 
 
 The remains are being processed, which could take several days, police said. Police will also be monitoring the beach in case more bones wash up. 
 
 The Medical Examiner is also expected to inspect the bones for possible identification. 
 
 The beach has remained close since that time as investigators perform a grid search. It is expected to reopen soon. 
 
 Both state and local police are investigating. 
 
 MORE LOCAL NEWS FROM CBS BOSTON 

 Authorities say a puppy taking a walk on a Massachusetts beach with its owner uncovered a human bone, which led to the discovery of several others. 
 
 A man walking his dog found the bones Saturday morning on the Newbury side of Plum Island. 
 
 Watch NewsCenter 5's report 
 
 Bill Barrett said his dog Tessa found what appeared to be the remains of a human foot with a sock still on it. 
 
 "We were just out for a walk on the beach with the dog," Barrett said. "We walked over there, and I said no leave it. It was the lower half of the leg with foot still attached, sock on the foot." 
 
 Investigators discovered more remains later Saturday once the tide had changed, according to police. 
 
 It was first unclear if the bones were human or animal, but they were confirmed as human remains on Sunday, according to police. Investigators said Monday the bones were that of a man, but could not offer an age-range or ethnicity. 
 
 Cadaver dogs were called to the scene Sunday morning during a three-mile search that turned up more remains. 
 
 Newbury Police Deputy Chief John Lucey said police are still monitoring the beach in case more remains are found as the tides change. 
 
 "There was an effort to organize a sweep of this entire area to make sure there was nothing else, being conducted right now," Lucey said. 
 
 Police confirmed that the bones found were likely from the lower leg of a human. 
 
 Barrett said while it was hard to tell, it appeared to him the remains were from an adult male. 
 
 "Could have been a man or a woman, but the sock was big enough that it looked like a guy," Barrett said. 
 
 Investigators expect processing of the remains to take several days.
– A man watched in horror yesterday as his Labrador discovered a human leg on a Massachusetts beach, the Boston Globe reports. Bill Barrett says he and his puppy were out for a walk, searching for seashells on Plum Island Beach, when the leg turned up. "We walked over there, and I said no leave it," the Newbury man tells WCVB. "It was the lower half of the leg with foot still attached, sock on the foot." Police have since cordoned off the area, brought in cadaver dogs, and found more remains that washed up south of the initial find, CBS Boston reports. Officials say police will try to identify the body parts by combing through missing person cases. No word yet on whether the remains belong to a man or woman, but Barrett says that "the sock was big enough that it looked like a guy."