Cultural institutions are seen as “soft targets,” experts say, as thieves shift from stealing prized paintings, to artifacts that can be dismantled, stripped or melted down for their expensive parts.

The Louvre in Paris has closed its doors for a second consecutive day as police pursue the culprits behind a brazen robbery of royal jewels.

Footage shared by France’s BFMTV shows a masked suspect calmly cutting through a glass display case with a handheld tool while museumgoers walk by, seemingly unaware of the unfolding theft.