Indian workers hired by the Serbian branch of China Energy Engineering Group Tianjin Electric Power Construction, a subcontractor of Linglong, allegedly experienced human trafficking for the purpose of labour exploitation according to a complaint made by ASTRA. The workers are owed wages and their passports had been taken. Their contracts were also not in accordance with Serbian law and their working hours were over the legal limit. The complaint also says the workers were moved to other construction sites in Serbia, such as a railway construction site in Subotica, on the border with Hungary, although they did not have qualifications for the job and did not sign any contract obliging them to do that work. ASTRA also noted their dire living conditions, saying 16 people were placed in one room, that they did not have three daily meals as promised by the employer, or basic hygiene conditions. After speaking to police, the workers reported they had been attacked by managers from Linglong. One of the workers was injured in the attack.