A 23-year-old man was arrested on suspicion of encouraging an act of terrorism in connection with a website that listed MPs who voted for the Iraq War, police said today.
The man was taken into custody at 9.30am in connection with the internet blog which influenced a student who tried to kill MP Stephen Timms.
Officers from the West Midlands Counter Terrorism Unit conducted a search of the man's home address in the Dunstall area of Wolverhampton and arrested him under section one of the Terrorism Act 2006, West Midlands Police said.
A police spokeswoman added: "The website is the same one that was in the press last week in connection with stabbing of MP Stephen Timms."
Detective Chief Inspector John Denley said: "We are treating the contents and implications of this blog very seriously, and have taken action this morning to progress our investigation."
Computer and electronic equipment was seized for examination from the suspect's home address, police said.