Three masked, armed thieves entered the Zurich museum in broad daylight, confronted the guard, grabbed the paintings and escaped inn a white vehicle.
The paintings that were stolen were Monte's 'Poppies Near Vetheuil, Degas' 'Count Lepic And His Daughters', Van Gogh's 'Chestnut In Bloom', and Paul Cezanne's 'Boy In The Red Waistcoat'.
Total value of the heist: $160 million.
Picassos, on loan from Germany, were stolen from a museum in another Swiss town recently.
Police are searching still for the thieves involved in both robberies. There is a reward of $91,000 being offered for information leading to the return of the art work.