WILSON COUNTY, Texas -

Authorities have issued a Silver Alert for an elderly man missing out of Wilson County.

The Wilson County Sheriff's Office says Emilio Valdez Flores, 77, was last seen at 9 a.m. Sunday morning in Floresville, Texas, located about 30 miles southeast of San Antonio.

Officials say Flores was last seen driving a 2009 Chevrolet Impala with Texas license plate BC5K927.

Authorities say Flores has been diagnosed with cognitive impairment.

Anyone with information on Mr. Flores' disappearance should call the sheriff's office at  830-393-2535.