Raiders armed with hatchets and crow bars have attacked and tied up a couple as they stole paintings and jewellery from their home.
The man, an auctioneer aged in his 70s, and his wife suffered minor injuries during the burglary near Bray, Co Wicklow, between 2.30am and 3.30am on Friday.
A Garda spokesman said three masked and armed men entered the house in Rocky Valley, Kilmacanogue, and tied up the pair.
"Both occupants were assaulted," he said. "The three armed men left the house having taken a number of items including paintings and jewellery."
It is understood a safe containing personal items was also taken during the robbery.
The raiders wore balaclavas and gloves and spoke with Dublin accents.
Two are described as being between 5ft 10in and 6ft tall, and the third was 6ft 5in tall.
Gardai in Bray are anxious to speak to anyone who saw anything unusual in the area in the early hours of the morning to come forward.
"They are particularly interested in two cars that may have been at or near the scene, they are described as a Silver Fiat Punto or similar and a Silver Nissan Primera or similar," the spokesman added.