Dutch police Wednesday arrested seven suspects who belong to what they call "a network of radical Muslims."
Two were captured in the Hague after a 15-hour standoff that left one suspect and three policemen wounded.
Police have not said if the network is tied to last week's murder of Dutch filmmaker Theo Van Gogh, a vocal critic of Islamic extremism. A Muslim extremist has been charged with the killing.
Meanwhile, Spanish authorities are probing a possible link between the Van Gogh murder suspect and a Moroccan terror suspect jailed last year in Spain for alleged involvement in a string of bombings in Casablanca.
Also Wednesday, Spain's top anti-terrorism judge ordered two more suspects jailed in a failed plot to bomb the High Court building in Madrid. Thirty-five people have been jailed in the plot so far.
Some information for this report provided by AP and Reuters.