“‘The sources of illegal fentanyl are mostly considered to be Russia, Belarus, and Ukraine,’ Vaher says. ‘One of the reasons why fentanyl made it to Estonia’s injecting addicts so fast after the market was cleared of heroin is a common border with the producer country and some common communication networks between Estonian and Russian drug addicts and dealers.’”
Source: ‘China White’ drug killing Estonia’s Russian speakers | GulfNews.com