A court in southern China has handed down sentences to at least six foreigners involved in a global methamphetamine operation, including a Canadian given the death penalty.

The Jiangmen Intermediate People’s Court on Tuesday sentenced 11 people, including an American and four Mexicans, who produced more than 63 kilograms of the illegal drug. 

The Canadian was identified as Fan Wei, but it was unclear whether that’s a legal name.

A person identified as Wu Ziping was also sentenced to death; the court did not give Wu’s nationality.

Fan Wei and Wu were the only two to receive the death penalty, according to CNN.

The sentence is likely to further strain relations between Canada and China. Canada arrested a Chinese tech executive last December at the request of the U.S. and since then, China has detained two Canadians and delayed some Canadian exports in apparent retaliation.

According to the court, Fan Wei and Wu conspired to manufacture and sell the drugs in 2012, and brought the others — described as “drug-making technicians” — on board. Between July and November of that year, the court says, the group set up a “den” in Guangdong’s Taishan city, where they produced and sold more than 63 kilograms of methamphetamine and 365.9 grams of dimethyl amphetamine.

A court employee reached by phone declined to give further details.

In a separate drug-smuggling case, China sentenced Canadian Robert Lloyd Schellenberg to death in a sudden retrial in January — one month after Canadians Michael Kovrig and Michael Spavor were detained on vague national security allegations. The moves were widely seen as punishment for Canada’s arrest of Meng Wanzhou, chief financial officer of the Chinese telecom company Huawei.

China has also suspended the licence of two major Canadian canola exporters, alleging officials discovered hazardous organisms in canola seed shipments.