UPDATE: Amagansett Man Reported Missing Has Been Located

Update, 11:55 p.m.: The New York City Police Department has located Bruce Negrycz II of Amagansett, according to Chief Michael Sarlo. The Silver Alert for Mr. Negrycz has been canceled. However, he said he didn't yet have anything further on the condition of Mr. Negrycz, who is 68 and suffers from dementia. 

Originally, 11:23 p.m.: An Amagansett man suffering from dementia has gone missing, and police are asking for the public's help in locating him. 

Bruce Negrycz II, who is 68, was last seen on Main Street in Amagansett on Thursday, Christmas Eve, at about 4 p.m. He lives at 203 Main Street. On the East Hampton Town Police Department's Facebook page, police wrote Mr. Negrycz was last seen walking on the sidewalk on Main Street. It was not immediately clear when police received a report he was missing. 

Mr. Negrycz was described as having a medium build at approximately 5 feet, 7 inches tall and 130 pounds. He has a large mustache, a goatee, and a clean shaven head. He may have been wearing a red shirt and "a fedora type hat," police said. 

The Suffolk County Police Department issued a Silver Alert late Saturday night. Silver Alerts are issued by law enforcement for missing people with cognitive impairments, such as Alzheimer's disease.

Anyone who may have seen Mr. Negrycz or has information about his whereabouts has been asked to contact the East Hampton Town police at 631-537-7575, or call 911.