SHANGHAI -- Police in Shanghai confirmed a mysterious black roller suitcase found before a downtown Tesco outlet late on Sunday didn't contain any dangerous articles.

The suitcase was found to be laying at the entrance of Tesco shop on Guangxin Road, Putuo District of Shanghai, around 8:30 p.m.

Police arrived shortly and condoned off the site. All the customers at the shop were evacuated.

The suitcase was later found to be empty.

Normal order resumed at the scene soon.