The longest-standing dark web drug market worth £200million has been dismantled following a years-long investigation, as its mastermind is arrested in Barcelona.

The site, known as Archetyp Market, was busted last week by European authorities with the help of the US in an effort dubbed 'Operation Deep Sentinel'.

Europol said in a statement on Monday that between June 11 and 13, 300 officers were deployed to carry out a 'series of coordinated actions' across Germany, the Netherlands, Romania, Spain and Sweden targeting the platform's administrators, vendors and technical infrastructure.

It added that the platform's infrastructure in the Netherlands was taken offline and that the mastermind behind the operation - a 30-year-old German known as 'Big Boss' - had been arrested in Barcelona.

Users of the Archetyp Market website are now met with a banner informing them the site has been taken down.