Police were called to a property in the West End following the sudden death of a 64-year-old man.
Officers attended Thomson Street, near its junction with Perth Road, shortly after 3pm on Friday.
Police remained in the area for several hours.
A eyewitness said police were taking statements from people near a block of flats.
He said: “I was walking home from work when I saw a police car near the Dil’se restaurant. As I turned on to Thomson Street I saw a police van and another car was arriving.
“I live nearby and it was unusual to see a police presence in the area, even with the pubs nearby.
“When I came back out of my house there was an ambulance arriving on scene.
“I initially thought someone had been assaulted, given that police officers were taking statements outside.
“There were at least four police officers.
“It was certainly a shock when I heard someone had died in one of the properties.”
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A Police Scotland spokesman said: “Officers attended Thomson Street around 3.30pm on Friday in response to the reported sudden death of a 64-year-old man.
“There are no apparent suspicious circumstances, and a report has been submitted to the procurator fiscal.”