Police are appealing for public assistance to locate a man last seen in St Clair this morning.
Charles Hotz, aged 76, was last seen entering a gold Nissan Navara, with NSW number plates CH2647, in St Clair about 9.45am today.
When he could not be contacted or located, he was reported missing to officers from Nepean Police Area Command, who commenced inquiries to locate him.
Police and family hold serious concerns for his welfare as he has medical conditions that require treatment.
Charles is described as being of Caucasian appearance, about 175cm tall, of medium build, with white balding hair.
He was last seen wearing blue work pants and a yellow hi-vis shirt.
Anyone who sees Charles is urged to contact St Marys police or Crime Stoppers on 1800 333 000.