A man has won an original Pablo Picasso painting worth more than €1m (£870,000; $1.2m) in a charity raffle.

Ari Hodara, an engineer and art enthusiast, learned he was the winner on Tuesday when he answered a video call from Christie's auction house in Paris.

"How do I know this isn't a prank?" the 58-year-old asked when he was told he was the new owner of the 1941 work by the Spanish master.

Organisers said more than 120,000 tickets for the prize draw were sold at €100 (£87; $118) each, raising around €11m (£10m; $13m) for Alzheimer's research.

The draw was the third edition of the "1 Picasso for 100 euros" fundraising raffle, which was founded in 2013.