Man found with serious stab wounds outside Adelaide apartment

A man with stab wounds has been discovered by a resident outside his home in Adelaide's inner north.

The neighbour called emergency services who quickly arrived at the Torrens Road address about 8.30am.

The 63-year-old man was rushed to the Royal Adelaide Hospital in a serious condition, suffering from stab wounds to his torso.

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The man was reportedly targeted by two men, with one witness telling 9News she heard "kill him".

Pools of blood could be seen today splattered throughout the front of the unit complex.

Detectives are investigating and are working to determine the motive for the attack.

A crime scene was established and a knife has been taken away for forensic testing.

Police are still searching for the attackers.