Some dark drug suppliers on the internet b & # 39; voluntary approach banned synthetic opiateid fentanyl because of the risks posed to users, according to the National Crime Agency.
They stopped because they can sell it & # 39; leading to deaths and subsequent police attention, one of the leaders NCA drugs, Vince O & # 39; Brien, told the Observer.
Fentanyl is a painkiller that is usually given by doctors in the form of & # 39; patch or lollipop. Can & # 39; up to 100 times more b & # 39; his health heroin addiction and leaving many people.
Figures issued in & # 39; August showed that there were 75 deaths related to it in England and Wales in 2017, An increase of & # 39; 29% from 2016 when there were 58.
Mr. O & # 39; Brien said the sales document & # 39; 'products & # 39; high risk "can & # 39; increase the risks to the dark web providers.
He said: "There are markets that do not accept listings for weapons and explosives – those are the ones who do not accept listings for fentanyl.
"Clearly, the law enforcement agencies to give priority to the provision & # 39; weapons, explosives and fentanyl on, for example, class C drugs – and can & # 39; is why they do it.
"There are also drug users on the dark web say on forums do not think it is good that people sell fentanyl because it is dangerous and kill many people."
Fentanyl first became a major issue in the UK the last year and the government promised to dampen previously caused fatal crisis like that seen in the United States, where tens of & # 39; thousands & # 39; deaths attributed to opioids.
Raper of & # 39; USA Mac Miller died from accidental overdose & # 39; cocaine, fentanyl and alcohol f & # 39; September.
And the captain died after Prince Superstar Accidental overdose when made self-administered fentanyl in & # 39; April 2016.