India, April 17 -- The Chinese Embassy in Japan on Thursday called on Japanese authorities to swiftly probe a series of terror threats and take steps to ensure the safety of its diplomatic missions and personnel in the country.

The concerns intensified after a 23-year-old serving officer allegedly entered the Chinese Embassy compound in Tokyo with a knife last month.

The individual, identified as Kodai Murata, a second lieutenant in the Japan Ground Self-Defense Force, scaled the embassy wall on March 24 and gained access to the premises while carrying a knife. The breach has been formally taken up by the Chinese side, which said it had lodged "solemn representations" with Japan over the matter.

Chinese officials have linked the March ...