Huge raid shut downs 400-plus dark net sites

Silk Road 2.0 and 400 other sites believed to be selling illegal items including drugs and weapons have been shut down.

The sites operated on the Tor network - a part of the internet unreachable via traditional search engines.

Troels Oerting from Europol told the BBC's Anna Holligan how the joint police operation between 16 European countries unfolded.