Updated

Police hunting for the thieves who broke into a Rotterdam art gallery and snatched seven paintings worth millions are releasing security camera footage of the heist in a bid to gather more tips.

But don't expect to see the thieves' faces.

Detectives said in a statement Friday "the perpetrators are not recognizable in the images" but they hope members of the public may recognize the bags they were carrying.

Three dark, grainy stills posted on a police website show the thieves apparently walking out of the gallery's rear door.

The thieves broke into the Kunsthal gallery in Rotterdam early Tuesday morning and fled with paintings by artists including Pablo Picasso, Claude Monet and Henri Matisse.