Brutal raiders sprayed a man with a fire extinguisher and threatened him with a bottle of whisky at a property in Slough High Street.
It happened at about 8am on Sunday, June 7.
The raiders forced entry into a room using the extinguisher before demanding money from a man in his fifties.
Despite the man being threatened and punched in the face the raiders left empty handed.
Now police have released images of four men they would like to speak to.
Investigating officer, Detective Constable Isabelle Harvey, based at Slough police station, said: “I believe the men in these CCTV images may have important information about this incident.
“If you recognise any of these men, or if it is you, please get in touch by calling 101, or making a report online quoting 43200168930."
You can also contact the independent charity Crimestoppers on 0800 555 111.
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