Australian police were looking for the owner of a suitcase "full of money" that was left at a restaurant on Tuesday.
Ten Network television reported the luggage found at Cafe Marco in the Burwood district of Sydney contained about 1 million Australian dollars ($1 million) in $50 notes.
Detective Inspector Ian Pryde told reporters a man wearing surfing shorts carried the suitcase into the Italian restaurant. He "seemed to get spooked" and left without the money.
The Daily Telegraph in Sydney reported that a 49-year-old Asian man matching the description given by staff was identified from nearby surveillance cameras.
"The man entered the cafe briefly and was acting suspiciously, fleeing on foot following an incident with another patron, without his bag," the report said. "Given the circumstances of him leaving staff checked the bag, discovering the cash."
New South Wales police confirmed to msnbc.com that a man had been arrested but declined to comment on whether he was the suspect who had earlier been sought.
A spokesman said the arrested man had been taken to a local police station but had suffered "a medical condition" and was taken to hospital where was being kept under police guard.
Police would only describe the suitcase's contents as "a significant amount of cash."
A cafe staff member contacted by telephone told The Associated Press she was too busy with customers to comment.
Earlier, a statement from New South Wales Police said: "Local detectives have commenced inquiries to determine who the money belongs to."