Jewelry and watches worth some 100 million yen were stolen from the Nihonbashi, Tokyo, branch of Tokyu Department Store Co. sometime between 10 p.m. Sunday and Monday morning, police said Monday.

Employees at the department store found about 15 empty showcases with broken locks on the sixth floor when they arrived for work at around 9:20 a.m. Monday, police said.

Store officials told police that a security guard found nothing unusual around the jewelry counters, which had contained about 900 items, during rounds at 10 p.m. Sunday night. The store closed at 8 p.m. Sunday. The Chuo Ward store is located 600 meters east of JR Tokyo Station.