An elderly man's beloved beagle is still missing after his stolen car was located, without the dog inside.

On Saturday morning, the 85-year-old left Millie in his Suzuki SUV as he went into a milk bar to buy the paper in the Victorian town of Blind Bight.

Watch the video above as a thief is caught stealing a Staffy puppy

When he came out of the shop with the paper he found that both car, and his nine-year-old Beagle, were gone.

The car was found on Warrigal Road in Bentleigh on Monday, but Millie was not inside.

Millie was in a car that was stolen outside a milk bar on Saturday. Credit: Eyewatch - Casey Police Service Area / Facebook

A 38-year-old woman from Hampton East was arrested but was released pending further inquiries.

Police are hoping to reunite Millie with her elderly owner and have urged anyone with information to contact CrimeStoppers.

RELATED: Beagle and car stolen while elderly owner pops into milk bar

The incident comes to light after a stolen Staffy was reunited with her owner after being allegedly plucked from her yard.

A man was seen on security vision loitering around the owner's Port Melbourne apartment block on Sunday and the dog's owner made an emotional plea on social media for her return.

On Monday night, the owner said Ava had been handed in to a local police station after being found at a school oval in Fawkner.