Hong Kong authorities said Tuesday they seized a total of over 4,000 pounds of live lobsters and sea cucumbers believed to be bound for mainland China, months after Beijing restricted imports of the crustaceans from Australia as tensions escalated between the two countries.

Hong Kong Customs said in a statement that it had seized 890 kilograms (1,962 pounds) of live lobsters and 930 kilograms (2,050 pounds) of sea cucumbers, with a total estimated value of 10 million Hong Kong dollars ($1.3 million) during the operation on Monday. Two men aged 40 and 45 suspected to be connected to the case were also arrested, the statement added.

The seizures come after a recent surge in the import volume of Australian lobsters to Hong Kong following China’s imposition of an unofficial ban on imports late last year. Sea cucumbers and lobsters are considered delicacies in Chinese cuisine, and China had previously accounted for over 90% of Australia’s lobster exports.