Suspect in bombing masks ID

Mr. Taarnby noted that by not revealing his identity, the suspect had “bought five days” after his arrest for any accomplices or associates to make good their escape.

Danish media reports say that Mr. Dukayev lost his leg to a land mine in Chechnya when he was 10 years old. He came to Belgium as a child with his mother, who was a doctor, and was granted asylum there.

Interviews with other boxers at the club in Liege suggest that he became radicalized within the past two years, according to the Politiken newspaper.

Scott Stewart, of the private-sector intelligence company Stratfor, said that individuals with travel or residence papers for European countries are highly valued by al Qaeda and its affiliates.

“Al Qaeda groups are always looking for guys like him who can travel freely in the West,” he said.

Mr. Stewart added that although Islamic insurgents in Chechnya had links with al Qaeda and other global jihadist groups going back to the Afghanistan war in the 1980s, he thinks it’s more likely the plot had been hatched on the Pakistan-Afghanistan border.

“I wouldn’t be surprised to see those kinds of links emerge” in the investigation, he told The Times. “By and large, Chechen militant groups are focused on their own struggle.”

Mr. Taarnby added that it is “highly significant” that his mother and sister appeared to have dropped out of sight several months ago. “Where did they go? Who is looking after them?” he said.

The Danish Security and Intelligence Service said last week that the country remains a “high priority” target for Islamic terrorist groups because of the publication of the cartoons.

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