Published: Mar 14, 2014 10:49 AM EDT

COLLIER COUNTY, Fla.- The Collier County Sheriff's Office is asking for the public's help locating an 85-year-old Immokalee woman who has been missing since March 6.

Neighbors reported Mary Carter Smith missing to the Collier County Sheriff’s Office on Monday night.

Smith’s Rose Street neighbors told deputies that they hadn’t seen her for several days and were concerned for her welfare, according to sheriff’s reports.

No one was home when deputies checked her residence. Deputies did not find anything unusual inside.

Smith’s brother, who lives out of state, told deputies he tried to contact her twice by phone Monday without success.

Deputies say Smith has short gray hair, stands 5 feet tall and weighs 150 pounds.

Anyone with information on her whereabouts is asked to call the Collier County Sheriff’s Office at 239.252.9300.