A thief has stolen nine WWII medals from an elderly Victorian man's home and smeared human faeces on an army uniform.
The 91-year-old man returned to his Frankston house, in Melbourne's southeast, last week to find it ransacked, and the medals gone.
The medals included an MBE and citation awards.
A substantial amount of cash, jewellery and an army uniform were also missing, with the total stolen haul worth about $30,000.
The thief also did a poo at the side of the Margate Avenue house and used some of the stolen clothing to clean themselves, police confirmed.
"It is a disgusting act and adds insult to injury," Detective Senior Constable Chris Fidler told AAP on Friday.
The house is believed to have been burgled between July 8 and 10 and the thief is believed to have forced their way in via the back door, he said.
"We appeal for whoever has possession of the property to return it, or hand it in anonymously," the detective said.
Anyone with information, or who saw suspicious activity in the area, is urged to contact Crime Stoppers on 1800 333 000.