Hezbollah-linked Picasso and Warhol stash raises red flag to art world thenationalnews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from thenationalnews.com Daily Mail and Mail on Sunday newspapers.
Internal crime agency urges vigilance, and greater efforts on monitoring and enforcement, but industry figures say study lacks focus and hard evidence of key vulnerabilities.