The thieves who stole seven valuable paintings from the Kunsthal in Rotterdam last week were able to strike so quickly because the door was not fully locked, according to Nos television.

The broadcaster says according to a statement from the gallery director, the doors are normally locked ‘mechanically and electronically’. However, after the alarm is activated, the electronic lock turns off automatically, in line with fire regulations, the statement said.
The burglars only had to force the mechanical lock to gain entrance. Security camera footage shows they were in and out in two minutes with the seven works of art. The police arrived at the museum five minutes after the alarm went off but the thieves had already gone.
The door locking system has since been revised, with the permission of fire officials.
So far, police have had 60 tips in connection with the heist. The seven paintings, including works by Matisse, Monet and Picasso, are worth up to €7m.