A former Canadian diplomat detained in China amid escalating tensions has been denied a lawyer and is limited to one consular visit per month, Bloomberg News reports. Michael Kovrig, senior adviser at the International Crisis Group, is reportedly being held at a secret detention facility where he has been granted one 30-minute visit by Canadian Ambassador John McCallum since his Dec. 10 arrest, sources told Bloomberg. Authorities question him three times a day, he is not permitted to turn off the light to sleep, and he appears stressed but unharmed, the sources said. Kovrig is one of three Canadian citizens detained by Beijing this month following Canada’s arrest of Chinese tech executive Meng Wanzhou on Dec. 1. Meng, the chief financial officer at Huawei Technologies, has since been released on bail.