Some 300 luxury-brand watches worth a total of 200 million yen were stolen from the Hankyu department store in Osaka in a cunning robbery that left officials scratching their heads.

A broken window was found in a hair salon on the same floor by a security guard at around 9 a.m. Sunday, suggesting that is how the culprit or culprits got in.

The building is undergoing a major renovation and scaffolding on the southern side comes close to the eighth floor, the Asahi Shimbun said on its Web site.