Man hit in head with hammer in alleged Adelaide assault

A man has allegedly been hit with a hammer in an assault on two people in Adelaide's south yesterday.

At about 6.30pm, a man and a woman were allegedly attacked on Main South Road at Morphett Vale.

A 27-year-old woman was allegedly assaulted and her arm injured.

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A 21-year-old man was allegedly hit in the head with a hammer, but his injuries are not considered life-threatening.

Police were unable to find the alleged attacker overnight.

However, they confirmed this was not a random incident, and the people involved are known to each other.

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