An insurgent group from the native country of one of the alleged Boston Marathon bombers says it has no affiliation with the attack that killed three and injured 170.
Investigators are still working to establish a motive for the deadly bombing April 15 through the surviving brother, Dzhokhar, who remains in stable condition at a Boston hospital and under heavy security. His older brother, Tamerlan, died in a violent police shootout in the early morning hours last Friday.
The Mujahideen of the Caucus Emirate in Dagestan, where Tamerlan was born, says its war is with Russia and denounces the American media for insinuating that it might have been involved.
"The Command of the Province of Dagestan indicates in this regard that the Caucasian Mujahideen are not fighting against the United States of America," said the group in a posting in Russian on VDAGESTAN.info, a website dedicated to the Mujahideen movement in Dagestan. "We are at war with Russia, which is not only responsible for the occupation of the Caucasus, but also for heinous crimes against Muslims."
The original posting was translated by Jihadology.net, a website dedicated to translating jihadi material.
Group leader Emir Dokku Umarov prohibited strikes on civilians, the posting says, including those in Russia. Umarov said in 2010 that he tries to avoid attacking civilians in Russia, adding "but for me there are no civilians in Russia," according to Prague Watchdog.
The Chechen militant leader has claimed responsibility for such attacks as the suicide bombing at the Domodedovo International Airport in January 2011 that killed 37.
"In this regard, the Command of the Mujahideen of the Province of Dagestan urges the media, primarily the American, to halt speculations and promotion of Russian propaganda," the group says. "If the US government is really interested in establishing the true organizers of Boston bombings, and not in complicity with the Russian show, it should focus on the involvement of Russian security services in the events."
Security experts say an analysis of the brothers' travel in recent years will yield much information about their potential motivation.
The Tsarnaevs' father still lives in Dagestan's capital of Makhachkala, and Tamerlan stayed with him during a six-month trip beginning in January 2012. "He was here, with me in Makhachkala," Anzor Tsarnaev told The Associated Press in a telephone interview. "He slept until 3 p.m., and you know, I would ask him: 'Have you come here to sleep?' He used to go visiting, here and there. He would go to eat somewhere. Then he would come back and go to bed."
Corrected 04/22/13: An earlier version of this story stated Tamerlan Tsarnaev died last Monday. He died last Friday.