Alibaba Group Holding Ltd. is facing an antitrust investigation in Hong Kong, according to sources familiar with the matter. The Hong Kong Competition Commission is scrutinizing the company’s logistics arm, Cainiao, for potential anti-competitive practices.

The investigation is focused on whether Cainiao has violated competition rules within the Hong Kong logistics market. Details of the specific allegations have not been publicly disclosed, but the probe suggests concerns about Cainiao’s market power and its potential impact on smaller competitors.

This investigation adds to the regulatory pressures faced by Alibaba in recent years. The company previously faced scrutiny from Chinese regulators, resulting in significant fines and business restructuring. The Hong Kong investigation signals continued regulatory oversight of Alibaba’s operations in different regions.

Alibaba has not yet issued an official statement regarding the Hong Kong investigation.