Meanwhile, US officials said Dutch police had arrested a fifth suspect - Andrus Nomm, 32.

BBC: Megaupload founder denied bail by New Zealand court

Nomm and Echternach were charged by the U.S. in an indictment Thursday along with Mr. Dotcom, 38.

WSJ: Judge Delays Kim Dotcom Bail Decision

One of those men, Andrus Nomm, was arrested by Dutch police in January.

WSJ: U.S. Pursues Extradition of Kim Dotcom

Also Monday, Megaupload software programmer Andrus Nomm, 32 years old, was arrested in the Netherlands and is likely to face extradition to the U.S. to face charges alongside other Megaupload staff.

WSJ: Judge Delays Kim Dotcom Bail Decision