Man arrested after Mona Lisa smeared with cake

Man, 36, placed in psychiatric care after painting's display case covered in cake in apparent climate protest

A 36-year-old man has been arrested and placed in psychiatric care after he smeared a glass screen encasing the Mona Lisa with cake in a purported protest against artists not focusing enough on the planet".

Officials at the Louvre Museum in Paris, where the enigmatic portrait holds pride of place, declined to comment on the bizarre incident on Sunday, which was captured on several phones and circulated widely on social media.