Friends, family devastated by fatal stabbing of man in Melbourne

Loved ones are mourning a man stabbed to death inside his workshop in Melbourne’s south-east last night.

Mechanic Paul O’Donnell was captured on video as he walked his dog to the shop in Olive Grove in Keysborough last night.

Police believe he was stabbed to death a short time later.

Paramedics soon arrived, but were unable to revive Mr O’Donnell.

Among friends and family visiting the scene today was Jake Hewgill, who described Mr O’Donnell as a father figure.

"I am so broken over this,” he told 9NEWS.

"I loved him like a dad and he always wanted to help other people.

“He was a true friend with intentions to help no matter what, and he deserved a lot better than this."

The attack on Mr O’Donnell marks the third stabbing in Melbourne and Geelong in the last 48 hours.

Anyone with relevant information is urged to contact Crime Stoppers on 1800 333 000.