A portrait of English mathematician Alan Turing became the first artwork by a humanoid robot to be sold at auction, fetching more than $1.0 million on Thursday.

A painting by an AI robot of the eminent World War Two codebreaker Alan Turing has sold for a record $1.3m (£1m) at auction. Sotherby's said there were 27 bids for the digital art sale of "A.I. God", which had been originally estimated to sell for between $120,000 (£9,252) and $180,000 (£139,000).