article_snippet.sent: London (CNN)Police said Thursday that there was no sign of forced entry to a building in a spectacular holiday weekend heist of safe deposit boxes in the heart of London's jewelry district.
article_snippet.sent: Although there was no sign of forced entry to the building, the detective said, "whether that involves inside knowledge will form part of the investigation.
highlights_snippet.sent: There's no evidence of forced entry to the building, police say .