Major heist of modern art at Dutch museum

A investigator searches the Rotterdam Kunsthal museum break-in during the night on October 16, 2012. Several paintings of considerable value were stolen from Rotterdam's Kunsthal museum where works by world-renowned 19th and 20th century artists including Picasso and Van Gogh hang, police said Ocotber 16, 2012. AFP PHOTO / ANP / ROBIN UTRECHT netherlands out (Photo credit should read ROBIN UTRECHT/AFP/Getty Images)

ROTTERDAM Dutch police say seven paintings stolen from the Kunsthal Museum in Rotterdam include one by Pablo Picasso, one by Henri Matisse, and two by Claude Monet.

The heist, one of the largest in years in the Netherlands, occurred while the private Triton Foundation collection was being exhibited publicly as a group for the first time.

The collection was on display as part of an exhibit of more than 150 works, in celebration of the Kunsthal's 20th anniversary.

Police are reviewing videotape footage and calling on any witnesses to the crime to come forward. The heist is believed to have taken place in the early hours of Tuesday.

Also stolen were works by Lucian Freud, Paul Gauguin, and Meyer de Haan.

The Kunsthal has not released which paintings were stolen. It announced will remain closed to the public as police conduct their investigation.