A website accused of directing users to pirated films, music and software has reopened just days after it was closed by Swedish police.
BitTorrent allows people to share large files across the internet
"We just got the servers up and running. They're not totally stable yet," said Fredrik Neij, one of those behind ThePirateBay.org.
"But we expect the site to be working as normal within the hour," he added.
Law enforcement officials raided 10 locations on Wednesday, confiscating computers and detaining three people.
Neij told the AFP news agency on Friday that he was "not worried about further police action because we have hired more servers in the Netherlands".
ThePirateBay.org had described itself to be the largest search index for BitTorrent, a system used for sharing large files across the internet.
The entertainment industry welcomed the action against a site it argued was a major source of music and film piracy.
The people behind the site argued they were not breaking the law.
They maintain that the site's function was to direct users towards the files that they search for and manage the uploads and downloads. The website itself did not hold any copyright files themselves.
The legality of the website has not been tested in Swedish courts.
In a statement the police said the people had been taken in for questioning "on suspicion of breaking copyright law or abetting the breaking of copyright law".
A statement on ThePirateBay.org website questioned the reason behind the police action.
"The necessity for securing technical evidence for the existence of a web service which is fully official, the legality of which has been under public debate for years and whose principals are public persons giving regular press interviews, could not be explained," said the statement.
"Asked for other reasoning behind the choice to take down a site, without knowing whether it is illegal or not, the officers explained that this is normal," it added.