LONDON — A Qaeda-inspired computer expert who dubbed himself “the jihadist James Bond” was sentenced to 10 years in prison yesterday for running a network of Web sites and hoarding videos of the murders of Americans Nick Berg and Daniel Pearl.

Morocco-born Younis Tsouli, 23, whom prosecutors said had uploaded guides to building suicide vests onto the Internet, used the online ID “irhabi007” — the Arabic word for terrorist and the code name of the fictional British spy. With accomplices United Arab Emirates-born Tariq al-Daour and British-born Waseem Mughal — who were also given prison terms yesterday — Mr. Tsouli offered advice and motivation to would-be terrorists on a myriad of Web pages run from their London homes, prosecutors said.

The group was the leading distributor of terrorist material on the Internet before they were arrested in 2005, said Evan Kohlmann, an American-based terrorism consultant who gave evidence in the case.

“There are people, including law enforcers, who initially thought these guys were computer geeks or hackers,” Mr. Kohlmann said. “But they were a lot more dangerous, they were the key aides to Al Qaeda. There was no one more skilled at what they did.”

All three had pleaded guilty to inciting others to commit acts of terrorism. Mr. Daour, 21, who prosecutors said hoped to study law, was sentenced to 6 1/2 years and biochemistry graduate Waseem Mughal, 24, got 7 1/2 years.

Images of Washington were found on Mr. Tsouli’s computer hard drive, stored alongside details of how to make car bombs, cause explosions, and produce poisons, prosecutors said. American law enforcement officials have said the Capitol building was featured in short video clips.

Prosecutors said the men referred to themselves as doctors intent on carrying out jihad in Internet messages, including one that read: “We are 45 doctors, and we are determined to undertake jihad and take the battle inside America.”

The Mayport Naval Base in Jacksonville, Fla., home of the now-retired carrier USS John F Kennedy, was named as a potential target. The message also referred to using six Chevrolet GT vehicles and three fishing boats and blowing up gasoline tanks with rocket-propelled grenades.

Despite the chilling similarity to attempted car bomb attacks in London and Glasgow last week, police officials said they have found no links between the two groups.

The case marks the first terrorism convictions in Britain based purely on evidence about use of the Internet, Judge Charles Openshaw said.

Judge Openshaw said Mr. Tsouli was a danger, even though “he came no closer to a bomb or a firearm than a computer keyboard.” Mr. Tsouli had a clear link to then-leader of Al Qaeda in Iraq, Abu Musab al-Zarqawi, who was killed by an American airstrike last year, Mr. Kohlmann said.

“He was acting like a travel agent for would-be suicide bombers, sending them straight to al-Zarqawi,” said Mr. Kohlmann, a case consultant for London police.

Following searches of the group’s computers, storage drives, and DVDs, police said they had found extremist material that — if printed out and piled up — would stand thousands of feet high.

Videos recovered included footage of the beheading of Berg, a 26-year-old American contractor, killed in Iraq in 2004 and the 2002 kidnapping and murder of Pearl, the American journalist, in Pakistan.

The three were arrested in 2005 as part of a Europe-wide operation to break up an alleged terror cell, which prosecutors said was planning an attack. Arrests were made in Bosnia, Denmark, and Britain.