Police are asking for sightings of a 65-year-old man with Alzheimer's disease who has gone missing in Christchurch.

Roussi Yaniez was last seen in the Bishopdale area.

He is described as a medium-build caucasian with light hair. He is about 175cm tall.

He is wearing a grey/beige jacket with blue pants.

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Anyone who sees a man fitting this description is asked to call police on 111.